The Bigboard was a Z80 based single-board computer designed by Jim Ferguson. It provided interfaces for:

• A keyboard
• A CRT with 24 lines by 80 characters
• Two 8" IBM 3740 compatible floppy disk drives.
• Two RS-232 serial ports.
• A parallel Centronics standard printer port

Running the CP/M operating system, the design was a success in the amateur computer scene. It was also sold to Xerox, which used it as a basic of their Xerox 820 desktop computer. The Kaypro 2 was an unlicensed pirate of the same circuit design.