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The Display Enhancement Packageby OAK Tree Systems This is a library that permits easy access to the the TI-99/4a 40-colum video text mode.


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Editor Assembler is a native development system for the TI-99/4A. It features a text editor, a TMS9900 machine code assembler, and sample code including an assembler version of "Tombstone City".


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IBM Typing Tutor is an educational program sold by IBM alongside their original IBM PC. The software itself was licensed from Microsoft, and is notable as being one of only two known commercial programs that were sold for the IBM PC on cassette tape. (The other being IBM PC Diagnostics )


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TI-Logo is an implementation of the Logo educational programming language that makes extensive use of graphics manipulation.


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TI-Writer was the standard word processor for the TI-99/4A. To use TI-Writer, you must have the TI-Writer cartridge (needed to load the disk software) and a TI-99/4A with the 32k RAM and disk expansion options.


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VisiCalc was the first spreadsheet program for personal computers. It was extremely successful, and pivotal as it was significantly responsible for moving personal computing out of the realm of hobbyists and in to the realm of serious business tools. application suite that also included VisiWord, VisiFile, VisiSpell, VisiTrend/Plot, VisiSchedule and VisiTutor. a GUI based environment. But that did not catch on. The similarly named Visi On Calc spreadsheet is not at all related to VisiCalc, and later had to be renamed to Visi On Plan.