It's a TI94A came out in late 80 or early '81, some time around there.
I think the site I lifted the pic from had a fact sheet on it
Trying to remember the other little computer that was out at the same time that used a tape deck for storage and all.
The operating system was straight BASIC. you used basic commands for everything...lol...
But I learned my way around basic on the little fucker
Heres the url I lifted the pic from. Cool little computer museum site, now that I actually look at it...
http://users.knoware.nl/users/stuurmn/ti94a.htm
Anyway, I bought one when they were pretty new, think I spent $150 or so for the base system. Then a year or two later I bought 2 more because TI decided to can the home puter department and they were selling them as low as $25.00 but there was a $50.00 rebate offer in the box
Gave 1 of them to my friend (partner still in some endeavours) and had the other one as a spare. Probably still sitting in the basement with our first NES and shit