My very first PC was actually an Atari 2600 with a programing module.

Then I moved up to a Texas Instruments TI99-4A, which had cartridges and you could hook it to a cassette recorder and save your programs!

Next I had a hand me down Commodore 20, which was their version of an XT with an 8088 processor. I upgraded that one with a second hard drive (for a total of 40mg), a color monitor, a math chip,and an external 2600 baud modem. You could watch the charaters come up on the screen as you downloaded a page from a bulletin board (remember those?)Had 560k memory, but using software tricks you could imitate extended memory with hard drive or co-opt some of the video memory. It ran at a full 4MB speed.