The Compaq Portable is an early portable computer which was one of the first IBM PC–compatible systems. It was Compaq Computer Corporation's first product, to be followed by others in the Compaq Portable series and later Deskpro series. It is not simply an 8088-CPU computer that runs a Microsoft DOS as a PC "work-alike", but contains a reverse-engineered BIOS and Compaq DOS compatible with IBM's PC DOS. The computer is also an early variation on the idea of an "all-in-one".
The Compaq Portable was announced in November 1982 and first shipped in March 1983. It became available two years after the similar, but CP/M-based, Osborne 1 and Kaypro II. Columbia Data Products' MPC 1600 "Multi Personal Computer", the first IBM PC compatible system, had come out in June 1982.