* Reconfigurable Manufacturing System, a system designed at the outset for rapid change to quickly adjust its production capacity and functionality in response to sudden market changes and customer demand * Rate-monotonic scheduling, a scheduling technique in operating systems * RMS granularity, a method of measuring photographic grain, developed by Kodak * RMS (band), a jazz/rock fusion band which consisted of guitarist, Ray Russell, bass player, Mo Foster and drummer Simon Phillips * Santiago Metropolitan Region ('Región Metropolitana de Santiago') in Chile * Relocation management services (employee relocation firms) * Royal Society of Miniature Painters Sculptors and Gravers, known as the Royal Miniatures Society * Royal Mail Ship or Steamer, ship prefix for vessels that carry mail under contract to the British Royal Mail

* Railway Mail Service, US mail transportation service until the mid-20th century

Stallman (often abbreviated 'rms'), veteran software developer and founder of the GNU Project and the Free Software Foundation RMS may refer to any of the following: _NOTOC_

Dibal rms software