Proudly, my first was a TI-99/4A. And did I ever get every penny out of that thing, nursing it along until 1993 or so.
Texas Instruments makes more chips (to this day?) than Frito-Lay. So of course their computer was something special.
16 bit TMS9900 CPU. Amazingly high quality parts and construction - literally cast aluminum around my 32k RAM expansion card. And they built-in owner loyalty by fostering and supporting users groups, even after they'd left the Home Computer market.
TI knew how to sell to scientists and engineers; they clearly didn't know how to sell to the general public. And they kept the software model closed (any different from Apple today?). It was the very earliest days of the digital age; they failed in the market as much for social reasons as for design reasons. So, sadly, that machine becomes an evolutionary dead end.
But what a machine. Look at TMS9900 Assembly Language.