The TI-85 was the first linkable graphing calculator made by Texas Instruments. It was released in 1992 and soon early adopters of these calculators were writing programs and games and posting them online, either in the form of raw source code or as programs in a special format created by TI for use with their freeware application and computer-to-calculator cable. At some point, several individuals found ways to create assembly programs for this calculator by overflowing the calculator's RAM by a specific amount. This was how such shells as Zshell and Usgard were created. Similar methods were used on the TI-82 and TI-92. All of my programs for the TI-85 are BASIC chemistry programs. The number of programs will steadily increase while I port programs I have written for my TI-89 to the other 3.
