Compute! (ISSN 0194-357X) was an American computer magazine that was published from 1979 to 1994, though it can trace its origin to 1978 in Len Lindsay's PET Gazette, one of the first magazines for the Commodore PET computer. In its 1980s heyday Compute! covered all major platforms, and several single-platform spinoffs of the magazine were launched. The most successful of these was Compute!'s Gazette, catering to Commodore computer users.