#retrocomputing tonight. This was actually my first computer. 100 3-digit decimal memory locations, one accumulator, ten opcodes. Operated with pencil, eraser, and sliding pieces of cardboard, with a cutout ladybug as the program counter. Later I designed my own using the HP-2100 instruction set.
@Cdespinosa That is so cool!
I had to learn that low level stuff from a book (on my own time, too, not in school)...
