My first computer (sorry no personal photos--this made its way to the junk heap around the mid 80s).

Red rectangle around computer (Rockwell 6502) used to enable polyphony (play more than one note at a time,. arpeggiator programs, etc. ). Yellow rectangle around late 70s cassette recorder used to store programs. Programs up to 2K in size, programmed in hexadecimal via key pad, machine language, not fun, so you wanted to store programs on tape lol.