This article is ongoing. This update: March 5th, 2004.
Pariticipation/comments/suggestions invited to brochmann(at)saltspring(dot)com
These are computer programs that:
Perform arbitrar precision arithmetic. Ie: results of calculations
can be expressed with literally
thousands of digits. For example, here is a fraction in decimal
for with 100 digits.

Two functions are defined
- then plotted
- then solved, the solutions being expressed in two different forms.
3D graphics are also available. This example included to "wow" you!
... and, of course, symbolic and numerical differentiation, integration and so on.
Both of these software are truly amazing. Each incorporates the notion of "workbook". You have a page of text with explanations and examples... but it is interactive. In other words, the usercan experiment with changing the values to see what effect this has.