Atari 165XE, with the bitchin' cassette tape drive. All you needed to copy friends' games was a double deck boombox- press "play" on original tape and "rec" on the blank
Was just a kid, the VERY FIRST THING I typed at the prompt was "Hello." I thought it was gonna answer me or something. Got a "bad syntax" error, which I didn't understand because a) was eight years old and b) didn't speak English.
Got some understanding of basic computing with a 80286 and DOS. Then 386 SX, which took 2.5 minutes to boot into Win 3.1, then a Cyrix. Awesome times. Got quite good with Delphi later, but nothing more "hard core"