- Rate-monotonic Scheduling , scheduling technique in operating systems
- Record Management Services , in OpenVMS
- Record Management System , a persistent storage mechanism available to some J2ME configurations.
- Remote Manipulator System , the arm on the Space Shuttle over its payload bay
- Rights Management Services , a component of MS Windows Server 2003 that helps corporations protect confidential data
- Root Mean Square , a concept frequently encountered in statistics and electronics
- " Watt s RMS", regarding power handling and especially music, is a misnomer for AC average power; see Audio Power
- RMS Granularity , a method of measuring photographic grain, developed by Kodak
- South Moluccas (''Republik Maluku Selatan''), a Dutch colony now part of Indonesia (but with a government in exile)
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