MSS

• Linguistics
• Managed security service
• Manassas (Amtrak station)
• Marine Corps University
• Marshall–Smith syndrome
• Marymount Secondary School
• Mass Storage System
• Massena International Airport
• Maximum segment size
• Merseyside Skeptics Society
• Microsatellite stability
• Microsoft Search Server
• Midland Secondary School
• Miles Sound System
• Ministry for State Security (disambiguation)
• Mobile Servicing System
• Mobile switching centre server
• Mobile-satellite service
• Modular Sleep System
• Monkton Combe School
• Monosulfide Solid Solution
• Montserrat Secondary School
• Moses Gate railway station
• Multispectral Scanner
• Pentlandite
• Piping and plumbing fitting
• Shetland dialect
• The Mother's Service Society
• manuscript