The Commodore Plus/4 is a home computer released by Commodore International in 1984. The "Plus/4" name refers to the four-application ROM-resident office suite ; it was billed as "the productivity computer with software built in".

Commodore International Corporation was a Bahamian home computer and electronics manufacturer with executive offices in the United States founded by Jack Tramiel and Irving Gould. Commodore International (CI), along with its subsidiary Commodore Business Machines (CBM), was a significant participant in the development of the home computer industry in the 1970s to early 1990s. In 1982, the company developed and marketed the world's second-best selling computer, the Commodore 64, and released its Amiga computer line in July 1985. Commodore was one of the world's largest personal computer manufacturers, with sales peaking in the last quarter of 1983 at $49 million.