What does FOS stand for?

Face of Studs - Technical drawings

Factor of Safety (IAA)

Faint Object Spectrograph - Astronomy

Fall of Shot (NVT)

Family of Services (SAUS)

Family of Small Arms - Military (MCD)

Fats and Oils Situation

Ferrite Disk Store (SAUS)

Festival of Sydney - Australia

Fiber-Optic Scintillating - Plate

Fiber Optic Sensor (IAA)

Fiber Optic Sigmoidoscope - Medicine (MELL)

Fiberoptic Sigmoidoscopy - Medicine (MELL)

Fiber-Optic System (SAUS)

Fibre Optical Sensor (SAUS)

Fibreoptic and Optoelectronics Scheme (SAUS)

Fibre Ottiche Sud SpA (EFIS)

Field Officers School - Formerly, AOS - LIMRA

Field of Science

Field Oriented Support (SAUS)

Filed Oriented Support (VLIE)

File Operating System (VLIE)

File Organization System (DIT)

Final Offer Selection (SAUS)

Final Operating System (MCD)

Finish One Side - Technical drawings (IAA)

Fire of Savannas (SAUO)

First-Order Spectrum (SAUS)

First Order Subroutine (SAUS)

Fisheries Organisation (or Organization) Society (SAUO)

Fisheries Organization Societies (SAUS)

Fisheries Organization Society (COE)

Fissura Orbitalis Superior (DB)

Flight Operations Segment (SAUS)

Flight Operations Support (KSC)

Floppy Operating System - Computer science (IAA)

Florida Orthopaedic Society (SAUS)

Follow-On Satellite (SAUS)

Follow-On Spares (AFM)

FORTRAN - Formula Translating System Operating System - Computer science

Forward Observer System - Military technology (DDF)

Foster Hardware Co. - NCIC firearms make code (NCIC)

Foster Manufacturing Corp., Racine, WI - Manufacturer code for watercraft hull identification number (USCG)

Fostoria, OH - Amtrak rail station code

Fractional Osteoid Surface - Medicine (EDAA)

Fragmentary Order System (SAUO)

Frank Orthogonal System - Medicine (MELL)

Freedom Of Speech (SAUS)

Free on Ship - or Steamer - Shipping

Free on Station

Free on Steamer (ADWA)

free on steamer or ship (SAUS)

Fructooligosaccharides - Type of carbohydrate

Fuel Oil Spill (DEEM)

Fuel Oil Supply (SAUS)

Fuel Oil Supply Co. (SAUO)

Fuel-Oxygen Scrap (PDAA)

Full Operational Status

Functional Operational Specification - Military (CAAL)

Function Operational Specification (SAUS)

Fundamental Operating System (SAUS)

Siraiya - Language code (ETLW)

faint object spectography (SAUS)

fossil (SAUS)

Free of Stamp - Finance (ODA)

Free on Steamer (EBF)