The meaning of the Acronym FOS is...

FOS is

• Finkel Osteogenic Sarcoma
• Friend Of Sauce
• Full Order Scan
• Ferry Operators Service
• Fortress Of Solitude
• The Fisheries Operation System
• Feat Of Strength
• Four Owners Share
• The Friends Of Stern
• Fundamental Operating System
• Freedom Of Speech
• Finger Of Suspicion
• Factory Outlet Store
• Found On Shelf

More Meanings For FOS:

• Forensic and Osteoarchaeological Services
• Fructo-OligoSaccharide
• Free Online Scholarship
• Furniture Online Shop
• Friends Of Scouting
• Forward Observer System
• Full Of Shit
• Faint Object Spectrograph (on HST)
• Flight Operations Support
• Federación Obrera Socialista
• Freak Out Squad
• Full of stool (constipated)
• Full Of Shit
• Fantastically Oaky Stuff
• Finkel Osteogenic Sarcoma

FOS is also in:

• Adults
• Botany
• Chat
• Chemistry
• Firms
• Funnies
• Military
• NASA
• Physiology
• Scouting
• Spanish
• Unfiled
• Universities