My first computer was an Apple 2e or 3e (can't remember), which had a DOS system. Had to learn Apple Basic to use it and then went on to learn the now arcane languages of FORTRAN and COBAL (remember those? LOL).
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"