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 (word processor, spreadsheet, database, and graphing); it was billed as "the productivity computer with software built-in".Internally, the Plus/4 shares the same basic architecture as the lower-end Commodore 16 and 116 models, and is able to use software and peripherals designed for them.