File used by Texas Instruments graphing calculators; contains source code written in the TI-Basic programming language; used to store and execute programs on a calculator. TI-Basic is supported in the following language variations: TI-83 Basic: TI-83 and TI-84 calculators 68k TI-Basic: TI-89, TI-92, and V200 calculators TI-Nspire Basic: TI-Nspire calculators