[1] Master Control System (->"IEEE Standard Dictionary")

[2] Medical Computer Services (->"IEEE Standard Dictionary")

[3] Mobile Communication Systems (IEEE Vehicular Technology Technical Committee) (->"IEEE Standard Dictionary")

[4] Modular Computer System (->"IEEE Standard Dictionary")

[5] Multiprogrammed Computer System (->"IEEE Standard Dictionary")

[6] Maritime Communications System (->"Lexikon der Text- und Datenverarbeitung")

[7] Meeting Communications Service

[8] Monte Caseros, Argentina - internationale Fughafen-Kennung