VMS may refer to: Communication and transportation Video management system, most often associated with digital CCTV surveillance Voice mail system, an alternate term for voicemail messaging An abbreviation for Vietnam Mobile Telecom Services, known as MobiFone Variable-message sign, an electronic traffic sign often used on highways Virgin mothership, a carrier plane for Virgin Galactic spacecraft (see Virgin Galactic#Motherships) Valley Metro system, in Phoenix, Arizona Vessel monitoring system, a tracking system for commercial fishing vessels The ICAO airline code of His Royal Highness The Crown Prince Maha Vajiralongkorn, a holding airline established under the name of King Rama X of Thailand that maintains legal ownership of his private fleet of aircraft Computers OpenVMS or VAX/VMS (Virtual Memory System), a computer operating system VMS (Visual Memory System) or VMU (Visual Memory Unit), a storage device for the Sega Dreamcast console Vulnerability management solution (or system) Vendor management system Schools Vail Mountain School, in Colorado Vaughn Municipal Schools in New Mexico Vallivue Middle School, in the Vallivue School District, Idaho Vandenberg Middle School, in the Lompoc Unified School District, California Vincent Mary School of Science and Technology, Suvarnabhumi Campus, Assumption University of Thailand Other uses Visitor Management system for managing the check-in/check-out process for visitors, contractors or staff at premises. Vendor management system, for managing vendors or temporary staff Volcanogenic massive sulfide ore deposit Voluntary milking system, an alternate name for an automatic milking system in dairy farming Voynich manuscript, an illustrated codex hand-written in an unknown writing system Virginia Motor Speedway Vasomotor symptoms, or hot flashes, a symptom of menopause