you had audio tape? we used teletype paper tape off a timeshare host...;)
It was the SYM-1. It had a Hex keypad and led display. 4K memory, 1Mhz 6502 cpu. It was the size of a sheet of notebook paper. It even had the holes for a 3ring binder. I hooked up a keyboard and VT100 monitor and used it to log in to the University mainframe at 300 baud. Man. I was state of the art! Or so I thought back when.