My first was the SYM-1. a 6502, 1 MHZ, 4k memory, led display, hex keypad. It was 8-1/2 x 11 and even had the holes so you could put in a ring binder. you used a audio cassette recorder for storage. I later got a vt100 monitor and keyboard for it.
That ol’ Microchannel PS2/50 has 2 40k 4.5” floppy drives, 256k mem, and a black/orange screen for DOS2. Dad gave it to me for a BD gift; cost $4,500 back then!