Although aging, the venerable Texas Instruments TI-83 remains one of the more popular graphing calculators currently on the market. We decided this would be a good place to offer a small series of TI-83 programs that calculus students may find useful. All are offered free of charge, but without support. The only restriction on their use is that no false claims be made as to authorship.*

The programs included in the group are:

• 1-D Riemann Sum;
• 2-D Riemann Sum;
• 3-D Riemann Sum; and
• a Slope Field/Euler's Solution program.

All of these programs are in a format specific to Texas Instruments Graph-Link™ software, bearing a '.83p' extension. You will need the appropriate software and calculator cable to install these on your calculator after downloading them from our site. These are available from TI and many retailers - click on the TI logo above for more information.

Notes:

1. These programs will only work on a TI-83, TI-83 Plus, or TI-83 Plus SE.
2. Each program uses some of the 10 functions provided by the TI-83 for graphing/calculations. (These are designated Y1-Y0, and are accessed by pressing the 'Y=' key on the calculator keypad.) The number used varies by program. All start by using Y0, then progressing backwards through the functions (Y9, Y8, ...). Any user functions stored in these locations will be overwritten every time the program is run - Beware!
3. Again, you need the Graph-Link package from TI to install the programs on your calculator.