Heh. You young whippersnappers...
http://oldcomputers.net/ts1000.html
Sinclair ZX-81. Popular from about 1981-1983. I saw "build-your-own" kits advertised, but didn't have the hundred bucks I needed. The thing came with two whole K of memory, y'know, and half of that was for the display...
http://oldcomputers.net/ti994.html
I did manage to scrape up a couple hundred for a used TI-99/4 - my first computer! - in '81. I was in sixth grade. The first things I bought to go with it were the "Extended Basic" cartridge (more powerful programming), and a dungeon hack game called "Tunnels of Doom," for which modules had to be loaded from tape. I still have the programming manuals for the thing. If you scroll down, you can see the TI-Modem acoustic coupler I was talking about wanting. 300 baud of telecommunicating goodness! I also borrowed the mini-memory cartridge (for assembly programming) and the speech synthesizer at various times.
http://www.atarimagazines.com/compute/index/ Compute! magazine of the early 80's. Source of many CompuServ (and other) ads.
If you guys were born in '83, you share that year with the venerated Commodore 64. I didn't own one of those until '85 or so. Wonderful machine, lots of personality.

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Though a program be but three lines long,
someday it will have to be maintained.
-The Tao of Programming