Personal Software Services (PSS) was a British software company based in Coventry, founded by Gary Mays and Richard Cockayne in 1981. The company was acquired by Mirrorsoft in 1987. PSS produced games for the Sinclair Spectrum, Amstrad CPC, Atari ST, IBM PC and other popular platforms in the 1980s and 1990s. Several games produced by the French company ERE Informatique were distributed in Britain by PSS, notably Get Dexter. They were especially noted for their strategic wargames, such as Theatre Europe and Falklands '82.
Source: Wikipedia, "Personal Software Services," available under the CC-BY-SA License.