IBM PC compatible | Original equipment manufacturer | manufacturer | Compatible Time-Sharing System | RWD (aircraft manufacturer) | Thomas Edmonds (manufacturer) | The Plug-In Drug | spark plug | original equipment manufacturer | Original design manufacturer | Mustard Plug | manufacturer's serial number | List of Xbox games compatible with Xbox 360 | List of games compatible with FreeTrack | Barreiros (manufacturer) | Viscount (musical instrument manufacturer) | VESA Plug and Display | Universal Plug and Play | Telephone plug | Sulzer (manufacturer) | STX (sports manufacturer) | Spark plug | Royal Scot (clothing manufacturer) | Plug Uglies | Plug Me In | Plug-in electric vehicle | PLUG Independent Music Awards | Plug compatible | plug | Phase plug |
COMPAREX Informationssysteme GmbH was founded in Mannheim in 1987, and was known until 2000 as the leading European Plug Compatible Manufacturer (PCM) of IBM architecture compatible mainframe computers.
Their concern was that open PL/S would give competitors, Amdahl, Itel (National Advanced Systems), Storage Technology Corporation, Trilogy Systems, Magnuson Computer Systems, Fujitsu, Hitachi, and other PCM vendors a marketing advantage.