TI-99/4A - Wikipedia

TI-99/4A FAQ: Console Version Differences

A brief history of the Texas Instruments 99/4A and the home computer price war of the 1980s

TI(ny) Is A New Take On The TI-99/4A

File:TI99-4A RS-232 Interface Card.jpg - Wikibooks, open books for an open world

Texas Instruments TI-99/4A computer

Texas Instruments TI-99/4A - Wikipedia

TI-99/4A development resources - TI-99/4A Development - AtariAge Forums

A Successful Failure: The TI-99/4A Turns 40 #VintageComputing @TXInstruments @howtogeek « Adafruit Industries – Makers, hackers, artists, designers and engineers!

Texas Instruments TI-99/4A – Wikipedia