The TI-99/4 and TI-99/4A are home computers released by Texas Instruments in 1979 and 1981, respectively. Based on Texas Instruments's own TMS9900 microprocessor
TI BASIC is an ANSI-compliant interpreter for the BASIC programming language built into the 1979 Texas Instruments TI-99/4 home computer and its improved
was designed to fully emulate the TI-99/4A computer while providing an advanced (for its time) virtual memory operating environment with full support for
existing operatingsystem. The TI-Nspire series uses a different operatingsystem compared to Texas Instruments' other calculators. The TI-Nspire includes