Calculators
HP-15C Calculator

Napier's Bones

Chinese Abacus

Japanese Abacus

Slide Rule

Computers
Altair 8800

ALTO Smalltalk-72

Apple II

Apple IIe

Atari 800 XL

Atari ST

BBC Micro

Commodore 64

Commodore PET 2001

Commodore Amiga

Dartmouth BASIC

Dartmouth Oversimplified Programming Experiment (DOPE)

DEC PDP-1 (Spacewar! Only)

DEC PDP-11

Everything IBM PC

IBM 5110

Heath Kit H89

Macintosh Plus - System 7.0.1

Microsoft Windows 3.0

MOS KIM-1

TRS-80 Model III

Misc
Intel 4004 System Emulator

Visual 6502

Virtual Keypunch