English abbreviations from fsgs to fso
- FSGS (Free Standard Game Server)
- FSH (Follicle-stimulating hormone)
- FSHTU (Fire Support Hand-held Terminal Unit(LCU))
- FSI (Fuel Stratified Injection)
- FSIC (Forward Sensor Interface and Control)
- FSIF (Family Service Foundation, Inc.)
- FSIN (Federation of Saskatchewan Indian Nations)
- FSIP (Faculty and Student Intern Partnerships)
- FSIQ (Full Scale Intelligence Quotient)
- FSIX (Functionally Structured UNIX)
- FSK (Federal'naya Sluzhba Kontrrazvedki (Федера́льная Слу́жба Контрразве́дки, Russian "Federal Counterintelligence Service", succeeded the KGB in 1991))
- FSL (Fossil Downs Airport)
- FSM (Federated States of Micronesia (ISO 3166 trigram))
- FSMAA (Fire Support Mission Area Analysis)
- FSMB (Federation of State Medical Boards)
- FSME (Finite State Machine Editor)
- FSMP (Forward Support Maintenance Point)
- FSN (Fox Sports Net)
- FSO (Food Service Officer)