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Update 11th February 2016...  This is me basically saying that this site is dead. This has probably been obvious for some years from the lack of updates but I thought I'd better make it 'official'. :-) Sorry, but the fact is that HP and I parted company (amiably) back about 2010 when our school switched to Casio. Since then I've progressively been less and less likely to pick up an HP calculator and my skills have eroded. Or rather "transferred" to Casio. As I've said in the "Contacts" page; feel free to email me but the chances are that I'm not going to be able to help.

Update 17rd November 2010...  Edited the Web Links page. Mainly to remove a whole heap of links that were out of date or irrelevent.

Update 3rd November 2010...  Added a link on the main page to a page on HPs site which contains USB drivers for Windows 7 64-bit. Still no news on an upgrade to the ADK.

Update 21st February 2010...  Added a link on the Utilities page to a site which has (apparently) produced an App for the iPhone allowing you to emulate the HP38G & HP39G on an iPhone. No idea how good or bad it is. I can't test it as I don't own an iPhone.

Update 13th January 2010...  As you may have noticed, the site hasn't changed in a LONG time. There are a couple of reasons for this.

One reason is that, after an initial flurry of activity in writing aplets I seem to have largely run out of inspiration. As apparently has everyone else - I haven't been sent a new aplet or game for a long, long time. The only emails I've had for some time have been questions from people in various places in the world asking me "How do I...". Which, I hasten to add, is fine. As long as you realise that I'm sometimes busy and can't help immediately.

The other critical reason is that I'm no longer using HP calculators in my teaching! Now, before you start calling me a traitor and burning me in effigy, this isn't my fault. The Curriculum Council in Western Australia, which determines what's taught and how in W.A. schools decided three years ago that, starting in 2009, all students MUST be taught using a CAS capable calculator. And, of course, that examinations would be written on the assumption that students had such a calculator. Now this meant that it came down to a choice between the HP 40gs, the Casio Classpad and the Texas Instruments nSpire. My school, and most others in W.A. ended up going with the Classpad. The problem with the 40gs was that, although it has a CAS, the CAS is really a separate and self contained module rather than being integrated into the other modules/aplets on the calculator. This, by itself, would not have been enough because we were already trained in the 39gs and REALLY didn't want to switch. BUT... the Classpad also had a spreadsheet and a geometry application and the 40gs didn't. And, to be honest, we've used those two tools a hell of a lot more in our teaching during 2009 than we did the CAS.

So. Until HP bring out a viable competitor to the Classpad and the nSpire (which I am very sure that they will) our school is going to remain a Casio one. Sigh. This is not to say that I don't miss my HP 'cause I really DO. I still tend to pull out the HP for most of my uses at my desk and just use the Classpad in the class room.

Update 19th December 2007...  Hopefully you've noticed the new look to the site. With the release of the hp 39gs and hp 40gs in late 2006 it became necessary to go through and update the site to reflect these new models. Although they are mostly the same (with a few new aplets), there are sufficient small differences that I couldn't just leave it. Besides, I was getting tired of the old look! :-) Anyway, I've spent about a week going through every page and updating it to reflect the new models and any knowledge I've picked up over the past years. In particular the Help page has a LOT of new stuff on it, mainly short topics extracted from my latest book "Mastering the hp 39gs & 40gs" which was again written under contract to HP.

I've been doing a lot of contract work for HP during this past year, mainly conducting professional development sessions for teachers who need to learn how to use the HP CAS (Computer Algebra System) of the 40gs. Our syllabus in Western Australia will expect students to be using the CAS in their learning from 2008 onwards so a lot of teachers are panicking madly at the moment. :-)

I haven't had many people send me aplets during the past year. I suspect that most of the really obvious ones have been written. Certainly I haven't had any bright ideas for a while. If there's something that occurs to you and you don't have the programming skills to create it then feel free to email me!

Update 1st April 2006...  Added a new aplet called HP Planetarium to the Miscellaneous page which calculates incredibly detailed astronomical information and displays a star chart for any time or location. Some of my students who are in the Astronomical Club found it very interesting. It is available for the 39G/40G and 39g+.

On the same page I also added a link to an interesting mobile phone Java applet that makes your phone into a very limited graphical calculator. I've not tried it and, given that I own an HP, probably never will. But it's interesting anyway... :-)

Update 13th March 2006...  Connectivity problems?

A number of people have recently reported problems with the 39g+ connectivity software. The symptoms are that when you run it the window appears for an instant and then disappears or does not appear at all. Starting it again has no effect. If you do a Ctrl-Alt-Del and list the processes running you will find that it is running even though it will not display. The problem may have been caused by a Windows automatic update changing files that it needs to run.

There are two possible solutions:

bulletSwitch to HP's version of the software (click here) or go to my Utilities page and download the Connectivity software again from the same location you got it earlier. It now has HP's version. This version is not quite the same as the one that used to be on my Utilities page and seems to still work correctly. 
Note: Sometimes this version does not install the driver correctly that lets it link to the computer. The symptom of this is that the program will now run but will keep telling you that it can't detect the calculator, OR that when you run it and plug in the calculator (switched on) Windows says that it is detecting new hardware and asks for the location of the driver. If this happens one of the options in the Windows driver install routine is to look for the drivers in a particular location. Tell it that they are in C:\Program Files\Hewlett-Packard\USBDriver and it should then work correctly (cross fingers!). I assume here that you've not told it to install in some other location!
bulletThe other solution is reported by Romaine Saunders. Apparently if you right click on the icon and choose 'Properties' and then select 'Compatibility' then one of the optional tick boxes is 'Windows 98'. Choose this and the program will then run. Unfortunately this seems to be a temporary fix because when the computer reboots the Windows 98 check box is no longer ticked and has to be re-applied. Anyone know why?


Update 27th Jan 2006...  Added a new aplet called Function Deluxe to the Functions and Calculus page. I've been very busy over the past few months doing a re-write of my book "Mastering the hp39g+" for HP and testing new models.

Update 18th July 2005...  The latest change is a small update to the emulator. On the 39g+ emulation pressing the decimal point often gave a zero instead. This is now fixed. You can download a 365Kb file called "keyfix.zip" which contains a replacement for the KML file that defines key positions. Just replace the existing file with this new one. 

Update 26th March 2005...  At the request of Wade Newton I re-wrote the Time Series aplet so that it would do any length moving average from 2 pt to 8 pt. I also added some code to make it more stable.

Update 26th February 2005...  I found a Mac version of the emulator! Good news for Mac users (for a change). See my Utilities page.

Update 7th January 2005...  I posted a revised version of the Inference aplet for the HP38G that fixes a small bug. This time the author, Detlef Muller, included the source code for those interested in sRPL programming.

Update 6th January 2005...  I've added a very good program called ChemLab39 by Tim Wessman to the Science page. Well worth a look for any chemistry students. 

Update 1st January 2005...  I've massively re-written my Help page. As well as a huge amount of new material it is also (hopefully) better organized and easier to work with. You may notice on the list of links that I have also transferred the "Tips & Tricks" section into the Help page. If you find any links that don't work or if you have any suggestions for topics that are not covered or not covered sufficiently then please contact me.

Update 29th September 2004...  There's now a link on my Help page to a set of tutorials by MichaŽl De Coninck on programming in sRPL.

Update 23rd September 2004...  I've added a collection of programs I've called "The Joondalup Collection" to my Misc page. This is a set of programs and aplets sent to me by two students. To their credit they included (minimal) documentation with each one and that's what got them a place on the site - take note hopeful programmers! There's also a new addition to the Games page. Al Borowski is an experience programmer on the hp49 scene and has begun to produce material for the 39g+. His first contribution is an adaption of Tetris for the 39g+ which is, I believe, the first game specifically written for the 39g+. I hope it's the first of many.

Update 12th August 2004...  I've massively updated the Linear Programming aplet. The most useful new ability is that it will now do sensitivity analysis on the objective function. In addition to this it will also allow you to list and edit the constraints you have entered. In the previous version you had to either re-enter all of them or use a method that was very clumsy to edit individual constraints. Overall it is now a really essential tool for students.  MichaŽl's also added another newsletter or two and is currently working on a couple of projects that may result in useful aplets. There's also a nice small program on the Functions & Calculus page called "Ultimate Simplifier" that converts decimal values into exact fractions, surds or fractions of pi or e.

Update 13th April 2004...  I've added the latest newsletter by MichaŽl De Coninck. This one contains an example of the use of an input form in s-RPL programming (read the previous one first) and is essential reading for those learning this difficult level of programming.

Update 27th March 2004...  I've added another small game by MichaŽl De Coninck called Memory 2. It's an HP39g version of the memory game where you turn over cards in pairs and try to match them. I also did a bit of re-arranging of the links on my "Web Links" page but this was just cosmetic. I also added a number of things to the emulator on my Utilities page. The first was a high contrast, large buttoned version of the HP39G for use by visually disabled students. The second was new versions of RamUpload38 & RamUpload39 that were sent to me by Christoph Giesselink, the author of the original package. This last will probably not be of use to most users but the two new faceplates - the hp 39g+ (see below) and the high contrast plate may well be.

Update 21st March 2004...  I've added Version X of Alan Lark's very original HP-Piano program. Highly recommended. Also the latest version of MichaŽl De Coninck's newsletter. For those interested in sRPL programming, he explains in this issue how to handle input forms.

Update 14th March 2004...  I've added a new faceplate to the emulator to simulate the new hp39g+. It's not currently fully compatible because I don't have a ROM image for the new calculator. Instead I've used the ROM image for the old 39G which means that the emulation is missing the new Finance aplet. When I manage to get one I will update it.

Update 11th March 2004...  I've added another worksheet to the list from the HP Teacher Support Group in Western Australia that can be found on my Tips & Tricks page. This one is from Tony Robb and is very good. A validation test and solutions are included.

Update 1st March 2004...  I've added a lot of information to my front page on the new hp 39g+. Now that it has been officially released in the US I can now discuss things that I was required to keep quiet about before.... well, some of it anyway! :-)

Update 24th February 2004...  I've added a Blackjack game by MichaŽl De Coninck to the Games page and updated my Slope Fields aplet to allow greater flexibility. There's also a couple of new newsletters on the Help page. For those interested, I've been very hard at work over the last few months on two big contracts for HP. The first of these, a huge set of linked PDF help pages on using the 39g+ can be found at http://www.hp.com/calculators/graphing/39gplus/.  Just follow the links to the Learning Modules - the first three of them are mine. The other project was a book on "Mastering the hp 39g+" - an update of the book I wrote years ago for the hp 38g. This will be available as a fully hyper-linked PDF file which will be a free download. It's not been posted yet so I can't give an address for it.

Update 6th January 2004...  I've added two sRPL aplets by Alan Lark. One is "Word HP" (Misc aplets page) which lets you view the aplet's Note in small font plus a few other features. The second is an aplet (Prob & Stats page) which adds some probability commands to the calculator, plus some info on chemistry. I also added a link to a French site which contains a 3D grapher (Functions & Calculus page).

Update 14th September 2003...  I've finally been able to post a really neat aplet by MichaŽl de Coninck which is a quick and easy 2x2 and 3x3 simultaneous linear equation solver. It's written in machine code so it is very fast and well designed. See the Functions & Calculus page of the Maths Aplets section. MichaŽl's been developing it for some time but we've been waiting until it is bug free (hopefully).

The big news for this month is the announcement of the impending release of the new HP39G+. This calculator has a new keyboard with a much better 'feel' and hopefully far greater reliability. It also has an extra Finance aplet to do time/value of money calculations, which has been ported from the HP49G. It also has a refreshing improvement in speed, varying from 25% in graphing to far more than double for purely internal calculations. I've seen it and I really like it.

Update 4th August 2003...  I've put the HP-Paint aplet on my site instead of just providing a link. Thanks to HP Poska for permission.  The August newsletter from MichaŽl de Coninck is out and can be found on my Help page.  It contains an interesting interview with Jordi Hidalgo (Note Filer, Ticking Clock etc) amongst other material.

Update 27th July 2003...  The site has not been updated for a while due to computer problems and illness.  I've now added a number of aplets which have been sent to me over the past few months and which I have not, until recently, had the chance to evaluate and post on the site.

These include:

bullet39gAplets.zip - This zip file contains most of the aplets from my web site saved as 39/40G state files so that you can run them on the emulator. See my Utilities page to download just this zip file if you already have the emulator, or download the whole emulator package.
bulletHP-Paint (Vers.3) - This is an aplet by HP-Poska which greatly enhances the abilities of the graphics editor on the HP39G. See the Misc or Utilities pages.
bulletTic-Tac-Toe (Vers.1.2) - An update to MichaŽl de Coninck's game. See the Games page.
bulletThe Matrix Screen-saver (Vers.1.2) - Another update from MichaŽl de Coninck. See the Games page.
bulletAlbhed Translater - this translates the strange language used in Final Fantasy X. A strange one by MichaŽl de Coninck but could be useful to some. See the Games page. 
bulletTransfer aplet - this one is one of mine. If you've had keyboard problems and can't access the Program Catalog or Note Catalog, see the Misc page.
bulletRoot Finder - this is also mine. It finds root of polynomials in a more friendly way than POLYROOT. See the Functions & Calculus page (Maths aplets).
bulletGreen Monkey Timetable - a strange contribution for calculator nerds by Greek Boi. See my Misc page.
bulletIonic Solubility - a contribution to the Science page by Jonathan Wan.
bulletChem Ions - another Science page gem from Jarryd Pinto this time.
bulletHyper Matrix - a program to automate some common matrix manipulations. See the Matrix page (Maths aplets).
bulletA new version of the L1540 library called L1542.  This does everything the old one does plus an astonishing set of extra functions.  Most importantly, it adds the ability to input, manipulate and output strings in programs!  See the Misc Aplets page or the Functions & Calculus page. Thanks go to Martin Lang and friends.
bulletWhack-a-Mole and QuickDraw.  Two games by Alan Lark. The first is interesting to programmers in that it uses the library above.
bulletUpdated descriptions of some of the games were provided by MichaŽl de Coninck.

More aplet still to come.... it's just a matter of finding time to evaluate them (while still having a life)!

Update 3rd July 2003...  MichaŽl De Coninck has delivered the first of his newsletters. I've put it on my Help page in PDF format in case you'd like to have a look. It has some interesting info in it on games and new programs in development.

Update 22nd June 2003...  Added a very small utility called GM Display to the Misc page that might be of interest to the beginner programmer.

Update 19th May 2003...  Fixed some links that were pointing to the wrong place on the Functions & Calculus page and the Geometry page. Thanks to Eric Rechlin for pointing them out. Eric runs a page at http://www.hpcalc.org which contains everything relevent not only for the HP38G, HP39G and HP40G but also for virtually every other HP calculator ever made. Worth checking out if you're a serious user.

I also added a small game by MichaŽl De Coninck which, although it's just a small (and very silly) joke aplet, is worth having a look at for those learning sRPL because it includes the source code.  A much better download, also by MichaŽl, is his 'screensaver' based on the movie "The Matrix". This also has the source code but more importantly is just really cool.

Update 11th May 2003... 

bulletA new version of the L1540 Library is posted in Miscellaneous Aplets and Functions and Calculus. If you haven't seen it before, this is an incredibly useful library that adds significantly to the capabilities of the calculator. Click here for more details.
bulletMichaŽl De Coninck, an enthusiastic, young programmer in Belgium, has decided to release a monthly "HP-39/40g News" email which will be circulated to any subscribers containing news of what's new on the scene. To subscribe, just email me and I'll pass your address on to him. His eventual aim is to establish a website of his own where you can subscribe directly, specialising in Games and how to program in sRPL (HP machine code). MichaŽl is also planning to have a "Games Review" page when he establishes his site, so if you'd like to see your name in print and you have a review of one of the games on my Games page then send it to me and I will forward it. Please make sure it is readable! :-)
bulletA new game is added to the Games page called Magic 8 Ball.


Update 27rd April 2003...  I added an aplet to the Maths/Geometry page which explores the relationship between the focus and the directrix of a quadratic equation/graph, and an update to the Tic-Tac-Toe game by MichaŽl De Coninck.

Update 23rd April 2003...  I added a small aplet to the Games page which is a taster for a game being written by MichaŽl De Coninck. No actual play yet - just a small 'movie'.

Update 19th April 2003...  I added a new aplet to the Maths Aplets page. This lets the user analyse and graph data which has been grouped into intervals. I also updated one of the existing aplets, the Probability Distributions aplet, to separate it into two and enlarge on the documentation.

Update 8th April 2003...  I added pictures to the HP Aplets page to make it easier to choose which ones are worth using. I also split the 38G version of "The First 50" into two sections. The problem was that the 38G is so short of memory (23Kb) that just downloading the list of programs was often enough to overload it, let alone any of the programs themselves! By splitting it this problem is ameliorated to a certain extent.

Update 19th March 2003...  Back in 2000 Hewlett Packard decided to "update" its website. In the process a lot of information and resources were removed. In particular, the collection of aplets for the HP38G that used to be a free download suddenly disappeared. Because the calculator division had been dissolved there was no-one to reverse the decision. Up to then I had never put them on The HOME View because they could be found so easily on HPs site. Now.... well, they are now on my site. Just click on the "HP Aplets" tag above.

Update 10th March 2003...  About a dozen new games for the fanatics. All by Noda, who specialises in converting old classics to the 39/40G.  Unfortunately he also specialises in giving very little documentation but I'm sure you'll figure them out. That's half the fun isn't it?

Update 28th February 2003...  I added a new tag up the top of "Tips & Tricks". This will contain quick tips and tricks on how to use the calculator.  There are 21 so far, all in PDF format. If you think you have a neat trick that others might use then consider contributing. Additionally, the local user group is trying to foster a spirit of cooperation by swapping ideas. These are also going to be posted on the "Tips & Tricks" page as they come in. Two so far.

bulletAdded UnLib to the Misc Aplets page. This library can be used to kill other libraries.
bulletAdded another article to the Tips & Tricks page on producing phase plots by combining the Parametric and Sequence aplets.

Update 22nd February 2003...  Recent new material has been:

bulletAdded Ticking Clock by Jordi Hidalgo (see update below this) to the Misc Aplets page.
bulletUpdated version of MineHunt for the 39/40G by Jordi Hidalgo to the Games page. Source code included.
bulletUpdated version of the Games Launcher for the 39/40G by Jordi Hidalgo to the Games page. Source code included.
bulletAdded the Central Limits aplet (written by me) to the Stats & Probability list on the Maths Aplets page.
bulletAdded HP Piano by Alan Lark to the Misc Aplets page which lets you play a piano keyboard and have your work recorded as a program for the 39G.
bulletAdded a french language version of the CAS manual for the 40G to the Help page. Thanks to Jordi for finding it.

Update 15th February 2003...  I added a really neat new aplet to the Misc Aplets page which puts a ticking clock on the HOME view.  Highly recommended and much thanks to Jordi Hidalgo for creating it. I also wrote an aplet which illustrates the Central Limits Theorem and put it on the Statistics and Probability section of the Maths Aplets page.  In addition to all this I had an email from a user who pointed out a broken link on one of my pages.  When I investigated I found about twenty or so! Hopefully they're all now fixed.

Update 12th January 2003...  I just added a new program to the Misc Aplets page which is really interesting - a Windows program which lets you play a 'keyboard' using your mouse and then saves your playing as a program file which the HP39G can use. Check it out!

Update 1st January 2003...  I hope you all had a happy Christmas and New Year. I'm still busy working on the Exam Archive CD for my students. It's going to be a fantastic resource for them but it's taking a LOT of time because all the exam papers have to be scanned in and converted to PDF files.  Even with the aid of a scanner at school that can scan double sided from a document feeder at a rate of a page per second it takes a lot of time to scan in that many papers. Approx 100 papers x avg 25 pages x 2 (solutions too) = 5000 seconds or 85 hours just scanning!! And that doesn't allow for the time needed to convert book style papers to single page style and just to sort and move them around. Then they have to be linked into the CD.... well, you get the idea!

Matt and Joshua are doing wonderful things with their new HPGEdit program! I'm told that they are editing Notes and programs already from all of the 38G, 39G and 40G. They can also create new aplets (well almost) and maybe, just maybe, will be able to build in communications via the cable. It's all early days yet and any of you who have been involved with a software project will know that there's many things that can happen.... but I'm quietly confident - these two guys are really brilliant. We're still looking for a beta tester for the Mac version so if you're an HP user reading this and you work wholely or in part on a Mac then please contact me.

I just bought a DVD player (my Christmas present to myself) and so I've been immersing myself in the Lord of the Rings Extended DVD version. It's just amazing what they were able to do with computers in creating the images and fight scenes. If you haven't read about it then do yourself a favour.

I wrote another maths text book last year (Linear Functions 1) as one of a series. I'm currently trying to persuade myself to start on another one but finding it a bit hard to get enthused. I'm also trying to work up the enthusiasm to go back and revisit the manual that I wrote on using the HP39G. It seems likely that I will not be able to publish it on paper so I'm going to bring it out as an electronic version and sell it on this website. However, if I'm going to do this then it really needs to be electronically hyper-linked much more extensively than one normally does when writing a paper book. This is going to be quite time consuming and boring. Sigh!

On the website I have duplicated the Surd Simplifier program so that it also appears on the Functions & Calculus page. Similarly so that the L1540 Library appears on a number of pages including the Science page.

Update 16th December 2002...  I'm currently working on another project. I'm producing a CD which will be given to all the year 11 and 12 students (final 2 years) at my school. With a web based interface, it will contain exam papers with solutions, study hints and all the calculator files that each subject might need together with the software to download them.

Update 23rd November 2002...  Modified the appearance of a few pages. The most visible change is some convenience links at the top of my Web Links page so that you don't have to scroll through the whole page to find things.
Matt Grosvenor has teamed up with Joshua King to work on the new version of the ADK called HPGEdit (tentatively). With the two of them both working on it we can really expect good things!

Update 15th November 2002...  I had someone take offense because I had inadvertently put some information on the site without acknowledging that it had come from them, making it look like it was my idea when it wasn't. I've corrected that and gone through and made it clearer on each aplet who the credit belongs to. Most of it is mine of course but there's a lot here that comes from others and which I am very grateful for.

I had to update my Curriculum Vitae to apply for a job (which I decided in the end not to go for) and put it on the web. If you're interested, and want to know what I've been up to, click on the link at the top left of the page.

Update 4th November 2002...  Still adding more new material. Hope it's appreciated.

bulletNumber Theory         - a tutorial and accompanying programs (in German). See Misc.
bulletHPGCalc Font            - a font that works on Windows, Mac and Unix machines.
                                Lets you use the HP screen font in your documents. See Help.
bulletHPGEdit                   - news of first steps towards an editor for Notes. This one is
                                written by Joshua King in Java so that it works on Mac, PC &
                                Unix! Early days yet but it has potential.  See Web Links.
bullet3D Grapher               - an alternative version, in French, to the one that's been on
                                my site for years. See Functions & Calculus.
bulletGraphics Demos        - a set of four incredible demos of what is possible on the 39/40G
                                if you really know what you're doing. See the Misc page.

Update 31st October 2002...  Fine tuning the site. Fixing a few links that were not correct and so on. Hopefully it's all now working properly. If not please let me know.

bulletMusic Editor            - a simple program that lets you input and play music. 
                                See the Misc page.
bulletL1540 Library          - a really useful add-in library of new functions that become
                                available in HOME or in programs. Worth checking out on
                                my Misc page.

Update 24th October 2002...  Again some additions to the site. 

bulletNote Filer                - an updated version for the HP39G on the Misc page.
bulletMine Hunter             - an updated version for the HP39G on the Games page.
bulletLauncher                 - an alternative version to JYA's game launcher on the Games page.
bulletI'm trialling a different menu style down the left edge of the page. I'm hoping that it's more compact and so more easily used.


Update 20th October 2002...  Some more additions to the site. I've had to pay extra for space on my ISP because of the amount of material on the site - I hope you all appreciate it out there! You may not be aware of this but HP used to have a set of nearly 50 aplets on their site that you could download. Not many of them were as good as mine (of course! ;-) but they helped. Unfortunately HP removed all the pages from their site last year. My next big project is to add these aplets to my site since there's now only one other place you can find them. I'm trying to pursuade HP to pay me to do this so wish me luck! Recent additions are:

bulletLoan Table aplet             - a really useful new aplet to the Misc Aplets page.
bulletLoan Table aplet             - instructions on how to set it up yourself on the Help page.
bulletRounding Drill                 - a purely drill aplet on rounding to a number of decimal places
                                       or significant figures.


Update 3rd October 2002...  I have been going through all my old mail and trying to bring the website up to date with all the stuff which people have sent me over the past six months or so. The material added is:

bulletGames, games!               - a whole heap of new games to the Games page.
bulletDocumentation to Note Filer - see the Misc Aplets page.
bulletRoot Finding (Advanced) - see the Functions and Calculus page.
bulletGauss Jordan                  - see the Matrices page.
bulletCorrelation                    - see the Probability and Statistics page.
bulletSurd Simplifier               - see the Misc Aplets page.
bulletMine Hunter                   - new versions for 38G & 39/40G, see the Games page.


Update 20th September 2002...  Obviously the big update is the new look for the web site. I hope you like it and I would appreciate it if you would let me know if you find any links that don't work properly. 

The other big news is the release of the Note Filer by Jordi Hidalgo. This is going to be a fantastically useful aplet. For those of you who have extensive collections of notes, this aplet lets you organise them into folders in a similar way to the directories on a PC.

In the meantime there was great news on the ADK! Yohan in France has developed a version of the ADK for the HP39G and HP40G. I have updated the Help file I wrote for HPGComm and the ADK to include the new version of the ADK and put together a single package containing HPGComm, the ADK and the Help file, complete with an installation program.   You can find this package on my Utilities page.

I found a copy of the HP39/40G manual on HP Europe's site and I've made it available in PDF format from my Help page.  In the process I corrected a few errors which crept in before it went to press and, more importantly, indexed it thoroughly to make it easier to access.

Tim Wessman, a very talented programmer, created a new aplet called "Statpack39". It is available for the HP39G and HP40G and it massively enhances the statistics capabilities of the calculator.  Go to the Maths aplets page to download it.  A must have for university students!

During the past few months I've been trying to learn how to program in sRPL, which is the internal assembly code used by the HP39G's chip. It's an uphil battle but I'm hoping that it will eventually result in some faster aplets.

Update 25th May 2002...  I managed to modify the installation routine for the HP38G version of the ADK so that it installs the HP39/40G version instead.  As an added bonus I included in the package (and in the installation routine) my new Help file.  Although it is still not linked into the HPGComm program, the installation routine now copies it into the same directory as the 39G ADK and creates a shortcut in the Start menu Program group. On my Utility page you will find two packages: the first is a complete package which contains the HPGComm software and the 39G ADK plus Help file, the second contains only the 39G ADK plus Help file.
I also found a number of places in my web site which contained incorrect references that would have been producing problems. Hopefully they are now fixed. If you notice any others then plese let me know.

Update 20th April 2002...  There is now an ADK version for the HP39G/HP40G which can be downloaded from my Utilities page. At the moment it is simply a 'hacked' version of the HP38G utility but the person who modified it may be able to produce a more extensive version in the future.  Check back later for an update.

Update 23th March 2002...  I've updated the aplet I added earlier (Indices Practice) so that it not only provides the problems but also provides the answers if the students get a drill problem wrong.  One of my students recently discovered an interesting bug in the Solve aplet. I've got nice classes this year :-).  Despite protests, HP continues to fail to properly support HP38G & HP39G users. By removing the collection of aplets from their website they have effectively emasculated the calculators.  Although I have resisted the idea because of the amount of work involved, I'm beginning to think that I'm going to have to host the entire aplet collection on my site instead of only hosting non-HP aplets. 

Update 13th Sept 2001...  I've added an aplet called 'Indices Practice' which provides drill in indices problems.  I've actually had it for years but when I went to use it I found that I had not put it on my page.

IMHO HP continues to go downhill while disguising it as improvement.  In going after Compaq they are obviously changing their market focus since the layoffs have also begun.  Charles Lim, the project manager for the HP39G has moved on to other places and so, I gather, have others in the calculator division.  One of the most productive and innovative thinkers in the division, GT Springer, has moved to a competing brand! Not a good sign of things to come I think.  I find it worrying that at the time I write this HP's web pages for the HP38G and HP39G now have invalid links to the collection of aplets/e-lessons for both calculators and that the link to the Aplet Development Kit is also invalid. Considering the critical importance of aplets to these calculators it is incomprehensible to me that these links could be left invalid for the time that has elapsed now since I notified them.  I consider it to be another sign of waning interest on HP's part in school level calculators and if you too see this happening then I urge you to contact HP and tell them to pull up their corporate socks.  Forgeting any issues about bringing out new models, it should be a given that support should continue for the existing models still being used in the classroom!

Update 9th June 2001...  Time is short now that I'm back at teaching full time so there have not been many changes in the past few months, particularly in view of a number of family related issues that also consumed a lot of time.  Still, I haven't heard from anyone screaming about something important being missing from the site so hopefully it's still relevent and useful to all of you out there.  I still have plans bouncing around in my head of a new look for the whole page.  I'd like to make it more modern in its look and feel but I need to learn more about manipulating graphics using Photoshop before I can implement what's only an idea as yet.

HPGComm should be out shortly.  Just when I thought we'd spotted all the bugs I found another one recently.

On the section of the Utilities page where the emulator package is posted I refer to the possibility of an update pending. This is not looking hopeful. I had hoped that Eric Rechlin, one of the contributors to the package, might update his keyboard mappings to match those of the others but this has not happened so far.  I suspect that, like all the rest of us, he's chronically short of time.

The new HP39G has been well received so far, which is very heartening in light of all the work that I and others put into it.  I'm not at all happy with the keys in that they don't have the same nice feel that the 38Gs had and that pressing the same key twice sometimes misses.  This causes problems in data entry where a value of 33 may be entered accidentally as 3.  Unfortunately the feel of the keyboard was not something that I had any input into.

There have been a few reports of some problems with calculators unexpectedly resetting.  In every case that I've heard of so far this can be cured by doing a full factory reset.  Performing a full reset will clear the memory completely (apart from built in aplets) so make sure you back up anything you don't want to lose to either a PC or a friend's calculator.  A full reset is done by holding down the ON, SK1 and SK6 buttons at the same time and then releasing them in the order SK6 first, SK1 next and then ON.  You should see a brief copyright image and then a message of "Memory clear".  Hopefully this should be the end of your problems.

Update 11th February 2001...  The emulator package is finished and posted.  There's a chance that there will be a  few changes so if you download it then check back later for any updates. I'm back at school now so the amount of time that I'll have available to do this sort of work will be limited.

Update 4th January 2001...  Apart from few small cosmetic changes to the page the look has not changed much.  A number of games are becoming available for the HP39G and are posted above.  I've added some questions to my FAQ page regarding the HP39G and I've added a new paper on "Using a graphical calculator to teach Functions and Calculus" to my collection.  

In the short term, I've updated the version of the HP38G Connectivity software on my Utilities page.  The latest is version 1, revision 4 for Windows.  The Macintosh version shown is also new but I'm not actually sure whether it is an update from the one that has been available from my page for years or not.  Since I don't have a Mac I can't test it but according to HPs web site it's the latest.  Perhaps someone with a Mac who has the old version will download and test it for me and let me know?

In the long term, I've been collaborating with James Bergamin, the author of the original program, to produce an update.  This update, HPGComm, will work with any of the G series: HP38G, HP39G and HP40G.  It also has a number of small improvements, such as the ability to create directories within the program instead of having to do it in Windows.  This program has just been released for beta testing (Jan 4th, 2001).

The latest news from HP is that they have decided to change their long time policy on emulators.  Although the emulators themselves are written independently of HP, they all require a copy of the calculator's ROM to work, which is of course copyright to HP.  Up to now HP have been unwilling to release electronic versions of the ROMs and so it's been necessary to use a fairly involved process to upload a copy from your calculator to the PC. HP have now decided to release these ROMs for all their calculators so you can now download the complete package of emulator and ROM for the HP38G and HP39/40G from my Utilities page.

In addition to this Christoph Giesselink and I (99% Christoph!) have worked out a way to upload the RAM of the HP38G to the PC.  This means that you can load an aplet or program onto the calculator and then upload it to the PC for use with the 38G emulator!  This is very important because the only thing that the emulators can't do is use their (non-existent) IR port to up/download aplets.  Using this method, I have produced copies of the RAM containing each of my mathematics aplets (one per aplet) and then stored them in a zip file for use with the 38G emulator.  You can find this zip file on my Utilities page.  After running the emulator you can use the File/Open command to load them.

The 'holiday' is over for me!  After spending a year contracting to HP I will be back working full time as a teacher in 2001. This means, unfortunately, that I will not be able to answer questions from 38/39G users as quickly as I have recently but I'll still try to help as much as I can.  The past year has been fantastic for me.  Quite apart from the incredibly rewarding experience of helping to design the new HP39G, I have travelled to many interesting places: America, India, Malaysia, Singapore and Thailand, as well as all over Australia.  However, it will be nice to get back to the classroom - I've been missing the students!  Mind you, I've not been missing the marking and report writing..... :-(

Update 28th September 2000...  A number of additions that took me a lot of time - I hope you appreciate them.  I've had a couple of emails from people thanking me for the help I've given them via my page and it is nice to know that all the work is appreciated.

bulletI've massively updated my help pages on how to save notes, edit them, download aplets and capture screens to take account of the new Connectivity software available.  See 'Utilities ' for the new software, and 'Articles, paper & general help ' for the instructions.
bulletI've gone through and checked all the links on my ' Web Links ' page to make sure that they all work (they didn't).
bulletI've changed the style of the tables in most of my pages.  I hope you like the new look.
bulletI've updated all my aplets and most of my other files to work on the HP39/40G, and added links to as many other HP39G games and files as I can (more to come).  See the 'Maths ', 'Misc ' and 'Games ' links for these.
bulletI've added a 'Utilities ' page which lists all the useful programs that you can download for the HP38G and HP39G.  These include the Connectivity software (a new HP39G beta version is available), the Aplet Development Kit, and a computer emulator for the HP38G.  If you are doing any training of HP38G users then I recommend strongly that you use the emulators as it allows you to show the whole calculator on the screen so that the participants can see you press keys with your mouse.  If you are a teacher then it will be interesting but not fully useful unless you have a datashow projector to project the emulator onto the wall for your class to see.

Update 16th June 2000...  In case you are not aware of it, Firmware have released a new Datalogger which can be used with any of the HP38,39,40,48 or 49 series of calculators. See the Science section above.  In addition to this I am now hosting Jim Donnelly's "Curves Collection" on my site.  This was originally produced by Jim but, since his site has closed down, I requested his permission to host the Curve Collection page on my site.  If you haven't already seen it then do check it out.

Update 18th May 2000...  A program is now available to convert 38G aplets to 39G aplets. This means that as soon as you buy your new 39G you can convert all your old aplets to run on it.  Warning: Convert a copy because it overwrites the old aplet with the new one.  This utility is free and can be downloaded from my Utilities page.  I'll have all my aplets converted soon and hopefully so will HP on their page.
As I mentioned earlier, there is now a new datalogger available.  New aplets for the 38G and 39G have been produced - if you'd like to download them click here to go to Firmware's site.

Update 15th May 2000...  The 39G is now being readied for release and you can find details about it on HPs site. If you'd like a quick list of how it improves on the 38G, read on the list below.  I'm in the process of converting aplets from 38G to 39G (they aren't compatible) and they will be available on my site soon.

  1. There is now 256K of memory!  This should allow you to store at least 50 aplets which is wonderful news.  In addition, this will allow you to use the datalogger to full effect - as you know the main problem before was that you could only store about 500 data points.  BTW: are you aware that there is a new datalogger available with extra features, as well as a new datalogger aplet?
  2. The keyboard has been greatly upgraded. Not only does it have a better 'feel', it has more keys available directly. For example, the differentiation and integration operators are now available directly from the keyboard as well as through the MATH menu.
  3. To help you manage the memory, there is a new memory manager view which lists the memory consumed by the various categories of objects (aplets, notes, graphics, lists etc).  Also, each of the category viewers (eg list view) now gives the memory size of the objects it controls.
  4. There is much more logical control of the angle and numeric modes in the 39/40G. In the 38G there were a number of problems. Firstly, because the HOME view was independent of the aplets it meant that if you graphed F1(X)=2SIN(X)-1 in Function (default=radians) and found a root then evaluating SIN(Root) in HOME (default=degrees) gave the wrong answer. This actually caused people try to return calculators under warantee, assuming that there was something wrong! Secondly, apart from in the Solve aplet, there was no way to set numeric mode for an aplet except via programming.

  5. This has been fixed in the 39/40G by ensuring that angle and numeric mode is controlled in one place only - the MODES view - and that the aplet and the HOME settings *always* match.  In line with this, the SYMB SETUP view has been removed, except for one place - 2VAR mode in the Statistics aplet. If you now set Fixed 4 in MODES and then SHOW a regression line or an equation then it will properly show in Fixed 4 format.
    From the 38G user's point of view this means that they need to be aware now in HOME that changing aplets may cause a change to angle and/or numeric mode settings.  To help users remember this the name of the aplet is now used as a title in the HOME view.  Sadly, this meant that the ability of 38G users to enter their own title had to go. The gain in control more than makes up for this.
    This change also has implications for programmers wanting to upgrade their aplets from the 38G to the 39/40G.
  6. The Statistics aplet now allows you to trace on the regression line.  On the 38G pressing up arrow in PLOT view only moved you from one data set to another.  On the 39/40G pressing up arrow once moves you from you from the data points to the regression line. Tracing on the regression line then gives you PREDY values onscreen. A second up arrow will then move you to the next data set (assuming that there is one).
  7. The Function aplet has been greatly enhanced! The (X,Y) button has been removed (don't panic - read on) and in its place is a GOTO button. This button allows you to jump the cursor directly to any point on the graph, even if it is off screen. This GOTO button is even available in the 'Signed Area...' (formerly 'Area...') function on the FCN button. The functionality of the (X,Y) button has been moved to the MENU button.  The MENU button used to be a double toggle between full menu and no menu.  It is now a triple toggle between full menu, (X,Y) mode and no menu (and back).  Another new feature (long overdue) is that the coordinates are displayed onscreen while tracing to the start and end points for 'Signed area...'. A further REALLY nice feature is that roots and intersections are 'remembered'.  For example, on the 38G if you graph F1(X)=X^2-2 and find the positive root then you get root 2. If you then do an FCN Slope you don't get the slope at root 2 you get the slope at the nearest pixel value to root 2. In the 39/40G this has been fixed. If you do an FCN Slope you will get the slope at root 2.  Similarly, if you find an intersection and then do FCN Signed Area then the default starting point will be that intersection.
  8. Three new aplets have been added to the list of built-in aplets. The Quadratic and Trig Explorer aplets, formerly only available via the web, are now built-in.  Also, a new Inference aplet has been added which allows investigation of confidence intervals and hypothesis testing. This aplet will even import statistical values directly from the Stats aplet!
  9. The 'Autoscale', 'Decimal', 'Integer' and 'Trig' views are now available from the ZOOM button in the PLOT view as well as via the VIEWS button outside PLOT.
  10. A number of bugs have been fixed.  For example, in the 38G if something went wrong in an aplet and the user was asked "Edit program? YES/NO" then answering YES usually resulted in editing the wrong program. This is fixed.  Also, in the Sequence aplet you can enter a sequence which is defined using memory values (eg. U1(1)=A, U1(2)=A*R, U1(N)=U1(N-1)*R) and have it change automatically if the values of A and R are changed in HOME.  There are others but those two spring to mind.
  11. The RelError variable has been added to the list of 2VAR Statistics variables, along with the population covariance. RelError is a measure of the goodness of fit which is independent of the curve used, whereas the correlation coefficient applies only to linear fits.  The closer that RelError is to zero, the better the fit. This variable was always available on the 38G but was not on any menu.  See my FAQ page for more information on RelError.
  12. The screen is protected by a clear plastic sheet which should make it less likely to suffer damage.
  13. Finally, the difference between the 39G and the 40G is that the 39G has an infra-red port and the 40G doesn't, while the 40G has a CAS system (Computer Algebra System) and the 39G doesn't. Otherwise they are functionally identical. Europe wanted CAS but not IR, while the US and Australia wanted IR but not CAS. You can never satisfy everyone can you?

Update 14th March 2000...  The new Connectivity Kit is now available.  Called HPComm38, it is fully Win 95 compliant and much easier to use.  You can download it from my Utilities page for free but you'll still need a cable.  While you're at it you might want to download the ADK (Aplet Development Kit) which is freeware from HP and can be found on my Utilities page.  Make sure you get the version for your calculator. 

Update 1st March 2000...  This is the new address for the HP38G HOME View.  During 2000 I have taken a year off teaching and I am now working for Hewlett-Packard.  My work consists of helping to produce educational support material and acting as part of the team designing the next generation of calculators.  I can tell you that it is great fun so far: being at the level of deciding which buttons should be on a calculator and exactly what the user should see when they press a button is a real buzz!  As time goes by I will continue to maintain and upgrade this page, and I hope I'll be able to give you as much of the inside gossip that my secrecy obligations allow.  You'll have to realise though that commercial realities will hold and I will now be limited in what I can say.

Update 25th October 99... Just for fun I wrote an aplet (see Misc section ) which does an animation by 'flipping' through 10 sketches to produce an aplet of two seals tossing a ball.  Not exactly earth shattering but I was wondering if it could be done fast enough to produce a reasonable result.  It's not too bad BUT the aplet is very (!) large - it will take up almost all the memory on your calculator if you load it.  I've also been giving some thought to what would be a good collection of aplets and/or programs for students to take into their exams in Applicable, Discrete and Calculus.  More on this shortly - I'll post a zip file containing my suggested collection for each subject

I've been writing a series of small programs rather than aplets lately.  Although the aplets are really great for teaching, and some are still essential (like the PDF aplet), I felt that in an exam you would want your 'tools' to be as small as possible.  Consequently I've written a series of small programs (Note (10/10/02: See The First 50) which have no frills (like error trapping) but are useful in exams. More of these are in the process of being written.  Suggestions are VERY welcome.

I'll be going to Melbourne in January for the World Mathematics Year 2000 Festival /Convention at the University of Melbourne, so if you're going and you've benefitted from my page you can buy me a drink.

PS....  It seems to me that HP must surely be thinking about designing a new model pretty soon.  Any suggestions for improvements that you'd like passed on?  So email me!

Update 15th September 99... I updated the Curve Areas aplet to make it slightly smaller and also to remove a bug I had missed.  I also added a whole series of programs to the Small Programs part of the Miscellaneous section.  The eventual aim is to produce a series of sets of small programs that will do anything that a student doing each of the year 11 and 12 courses will need.  If you have a look at what I've done so far (number 6 onwards) you'll see what I mean.  Suggestions for what programs might be required gratefully accepted.

Update 23rd August 99... Found a bug in the Sine Define aplet.  I had used an 'O' instead of a '0' (zero) which didn't become apparent until I ran it recently with a value in the memory of O which was non-zero.  I've also been working on enlarging it so that it shows the unit circle development of cosec, sec and cot as well.

Update 17th August 99... Added a neat little utility to the Misc section that reports on what percentage of memory is being used.

Update 7th August 99... I made some modifications to the Linear Programming aplet. Apart from changing the name from "LINEAR PROG." to "Linear Programming", the main change was that I modified the starting and ending routines to allow the user to retain an existing set of constraints. In the old version you lose any constraints you have stored if you exit the aplet to HOME (say) and then go back to the LIB view and re-start it. I changed this so that it checks to see if there are already constraints entered when you start it and queries the user as to whether they want to retain this data or discard it. When you quit using the VIEWS menu option it also checks to see whether the set of constraints entered should be kept or thrown away.

Update 2nd August 99... Added some more questions to the FAQ page.

Update 25th July 99... Added descriptions to the maths aplets. More information is available anyway via the 'More Information' link but I thought a thumbnail outline might be useful.

Update 21st July 99... A little bit of fine tuning to the new frames based pages & a lovely practical joke program!  You'll find it in the Miscellaneous section of the aplets page.

Update 7th July 99... I've rebuilt the pages to use frames.  The appearance is not all that different but the menus will now be accessible at all times instead of having to scroll up and down.  I know some people really hate frames but I thought I'd give it a go.

I've also added to the ApLets page and linked in a page of small programs that you can type in yourself.  I'm still adding to this new page.  A number of people, mostly students, have sent in small programs which are quite useful but are not fully fledged aplets.  I thought you might be interested in them, since they are small enough to be typed in on the calculator instead of requiring the ADK to develop.

Update 21th Jun. 99... So many people have sent me emails requesting advice on how to convert from one base to another that I finally gave in.  If you check the listing of maths aplets and programs you'll see the new zip file.

Update 8th Jun. 99... Still have not had enough time to do more work on aplets - I'll try to do more in the holidays. I visited India again to do professional development work for teachers in the Delhi area. As before, the teachers were very enthusiastic and eager to incorporate graphic calculators into their curriculum. The temperature was a trial - above 42 deg. Celcius for the whole week. No airconditioning in the schools of course! At least the hotel was cool.

Update 27 Mar. 99... Added the Transformer aplet which allows students to investigate the use of matrices to perform geometric transformations.  I have also been involved with the production of a training video for HP which will be used in schools in India, China and South-East Asia.  In December last year I travelled to New Delhi in India to demonstate the use of graphic calculators in teaching mathematics.  I visited three schools and spoke at a principal's conference.  I was very impressed with the expertise and enthusiasm of the Indian teachers and I felt that the response I received was very encouraging.  My productivity in aplets is not very high at the moment I'm afraid - my school, in its infinite wisdom, has taken away the time allocation for technology development which I have had for the last two years.  This means that any work I do has to be done in my holidays.  You can imagine how impressed I am by this.

Update 6 Feb. 99... Added another two aplets which can be used to introduce ideas in teaching probabilities. Also corrected some bad links which were pointed out to me.

Update 29 Jan. 99... Seven new aplets are now added to the list in the Maths set.  One of the new ones is a great aplet by Quin Pendragon which draws 3D graphs!  The documentation is now complete (I hope!) for all the aplets available on this page.  With Quin's help I've also completed the documentation for his other programs.  There's still more material to come but now that school has started again I don't know when I will have time to complete it.

Update 12 Jan. 99... I've added some aplets to the list in the Maths set.  I've also completed the web documentation of those and some of the others which had not been done yet.  One of the new aplets is by Andy Vella of La Salle College and is very good.  I've also received a large number of small programs from an enthusiast called Quin Pendragon. I'm hoping to make his programs available as soon as possible but I have to sort out the documentation first.

Update: 7 Oct. 98... If you're reading this then you're obviously aware that I've put a lot of work into redesigning my web site. I hope you like it.  I've put a number of new things onto the page in the process:

bulletlinks to games produced by a number of talented people around the world.
bulletsome new maths aplets:
bulletDandelions (mine)
bulletProb Distributions (by Craig Davis)
bulletQuadratic Explorer (HP+me)
bulletTrig Explorer (HP+me)
These last two aplets were designed by Bob Parker, Charles Lim & myself, programmed by two guru HP programmers Gerald Squelart & Jean-Yves Avenard, and the documentation was done by me. All modesty aside, they are FANTASTIC and I really recommend that you download them and try them.

Last April I was fortunate enough to have HP fly me to the United States to demonstrate for them at the annual convention of the National Council of Teachers of Mathematics (NCTM) in Washington DC. While there I had a wonderful time visiting New York, Niagrara Falls, Kennedy Space Centre, Las Vegas, the Grand Canyon and Los Angeles.  I also managed to find time to visit a number of schools and to talk to many teachers.  Based on this I have written a paper comparing the implementation of graphic calculators into the educational systems of Australia and the US.  I have also posted to the web an article on how to program more complex aplets on the HP38G, using the Aplet Development Kit (ADK).

I'm not planning to release the Exam Tools aplet - I've found in practice that it is too big. Most students are storing a lot of information in Notes and the Exam Tools aplet in its present form is too big to tolerate anything else on the calculator at the same time.  The Linear Programming section of it is still available as a separate aplet.

Update: 2 Jan. 98... At the request of a student in Portugal I've put the Linear Programming section of the Exam Tools aplet (see below) onto my free samples page as a separate aplet. I may update it if Filipe finds any bugs in it.

Update: 10 Dec. 97... I've been pretty busy at work so I haven't had time for much work on the HP38G. I gave a lecture on using the ADK to produce some more complex aplets at Edith Cowan University. Some of you seemed interested - when are you going to start producing some aplets of your own?? One person, Andy Vella from La Salle College, has made a good start with a program which calculates and displays complex roots (see above). There are plenty of ideas out there just waiting for people to adapt them. You may know that HP have moved their entire Calculator Division to Melbourne, Australia. I spoke to one of their bright sparks at the lecture and was favourably impressed. Planning has begun of the next generation calculator. I have submitted my suggestions, along with a number of other people - we'll just have to wait and see what happens.

Update: 4 Sept. 97... (Of interest to West. Aust. teachers) My current project is an aplet called EXAM TOOLS which is designed for students doing Applicable Maths. In addition to a number of other things, it does Linear Programming! i.e. You feed in the constraints (as inequalities) and the objective function and it will graph the inequalities, find the vertices of the feasible region and indicate the maximum and minimum values of the objective function on the region. The intent is that it will be eventually be available free to anyone. Hugh Alguire at the Secondary Education Authoriy has indicated that the S.E.A. may have a page on their site with "Essential Tools" for each of the calculators (HP, Casio, Sharp & TI). If so then the aplet will be available via that page also.

Update: 14 Aug. 97.... Yes, yes, alright! I relented and added another couple to the giveaway set. I'm just too nice, that's my problem! Will I add more? Well....

Also added 14/8/97... a link to a page containing a copy of a paper I gave out at a session on how to "program" the HP38G at a recent conference. It's very low level but you may find it interesting. It's heavy on the graphic images so it may be a bit slow to load if you have a slow modem.

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