All PCjs machines are built from the following sets of devices:
- 6502 Devices (e.g., Challenger 1P)
- 8080 Devices (e.g., Space Invaders, VT100 Terminal)
- 8086 Devices (e.g., IBM PC and compatibles)
- PDP-11 Devices (e.g., PDP-11/20, PDP-11/45, PDP-11/70)
These devices are user-installable components that you would typically find in a real personal computer, such as keyboards, disk drive controllers with one or more drives, video cards, etc.