| F&SS | Fuel and Supply Ship 
| Others |
| FSS | F**** Super Sweet
| Others |
| FSS | Facilities Support Services
| Others |
| FSS | Faculty of Social Sciences
| Others |
| FSS | Faculty, Student, and Staff
| Others |
| FSS | Fail Safe Server
| Others |
| FSS | Fail Safe State
| Others |
| FSS | Fail Safe System
| Others |
| FSS | Failed Signal State
| Others |
| FSS | Fair Share Scheduler
| Others |
| FSS | Family Self Sufficiency
| Others |
| FSS | Family Self-Sufficiency
| Others |
| FSS | Family Support Services
| Others |
| FSS | Fan Skin Series
| Others |
| FSS | Fast Sealift Ship
| Others |
| FSS | Fast Secure and Simple
| Others |
| FSS | Fast Slot Synchronization
| Others |
| FSS | Fast Synchronization Sensor
| Others |
| FSS | Fast System Switch
| Others |
| FSS | Fatigue Severity Scale
| Others |
| FSS | Feats Skills Spells
| Others |
| FSS | Feature Subset Selection
| Others |
| FSS | Federal Security Service
| Others |
| FSS | Federal Supply Schedule
| Others |
| FSS | Federal Supply Service
| Others |
| FSS | Federated Satellite Systems
| Others |
| FSS | Federated Star Ship
| Others |
| FSS | Fenyr Supersport
| Others |
| FSS | Fiber Storage Shelf
| Others |
| FSS | Field Spectrometer System
| Others |
| FSS | Field Support Services
| Others |
| FSS | Field Support System
| Others |
| FSS | File Sync and Share
| Others |
| FSS | File Synch and Share
| Others |
| FSS | File Synchronization and Sharing
| Others |
| FSS | File System Safe
| Others |
| FSS | File System Server
| Others |
| FSS | Filtered Survivable Schedules
| Others |
| FSS | Final Steady State
| Others |
| FSS | Financial Services Sector
| Others |
| FSS | Financial Services Specialist
| Others |
| FSS | Financial Shared Services
| Others |
| FSS | Financial Supervisory Service (Korea)
| Others |
| FSS | Financial Support Services
| Others |
| FSS | Financial Systems Services
| Others |
| FSS | Fire Support Station
| Others |
| FSS | Fire Support System
| Others |
| FSS | Fire Suppression System
| Others |
| FSS | Fixed Satellite Service
| Others |
| FSS | Fixed Satellite Services
| Others |
| FSS | Fixed Service Satellite
| Others |
| FSS | Fixed Service Structure
| Others |
| FSS | Flanking Sensor Suppression
| Others |
| FSS | Flat Sequence Sorter
| Others |
| FSS | Flat Surface Syndrome
| Others |
| FSS | Flats Sequencing System
| Others |
| FSS | Flats Sequencing Systems
| Others |
| FSS | Fleet Support Ships
| Military, Marine Corps, Navy, Water Transport |
| FSS | Fleetwood Sixty Special
| Others |
| FSS | Flexible Service System
| Others |
| FSS | Flight Service Station
| Others |
| FSS | Flight Services Systems
| Others |
| FSS | Flight Support Station
| Others |
| FSS | Flight Support Structure
| Others |
| FSS | Flight Support System
| Others |
| FSS | Flight Systems Simulator
| Others |
| FSS | Flingco Sound System
| Others |
| FSS | Floral Supply Syndicate
| Others |
| FSS | Florence Sawyer School
| Others |
| FSS | Florida Soaring Society
| Others |
| FSS | Fluffy Sofa Section
| Others |
| FSS | Food Service Specialties
| Others |
| FSS | Food set and sound
| Others |
| FSS | Food Standards Scotland
| Others |
| FSS | Force Sensitive Salami
| Others |
| FSS | Force Support Squadron
| Others |
| FSS | Forced Shity System
| Others |
| FSS | Forecast Shooting System
| Others |
| FSS | Forensic Science Service
| Others |
| FSS | Forest Service Supply
| Others |
| FSS | Formula Student Spain
| Others |
| FSS | Forres, Scotland
| Others |
| FSS | Forum for Social Studies
| Others |
| FSS | Forward Secure Sealing
| Others |
| FSS | Forward Sensing System
| Others |
| FSS | Foundation for Shamanic Studies
| Others |
| FSS | Foundation Stock Service
| Others |
| FSS | Foundation Stock Services
| Others |
| FSS | Four Summers to Success
| Others |
| FSS | Fox Sports South
| Others |
| FSS | Frame Synchronization Sequence
| Others |
| FSS | Frederick S. Strong, US Army General
| Others |
| FSS | Freestyle Shaper
| Others |
| FSS | Freight Shuttle System
| Others |
| FSS | Frequency Selective Surface
| Others |
| FSS | Frequency Surveillance System
| Others |
| FSS | Freshman and Sophomore Seminars
| Others |
| FSS | Friends Select School
| Others |
| FSS | Front Sonar System
| Others |
| FSS | Full Scale Simulator
| Others |
| FSS | Full Scale Span
| Others |
| FSS | Full Service Supplier
| Others |
| FSS | Full Service System
| Others |
| FSS | Full services supplier
| Others |
| FSS | Full Size Sedan
| Others |
| FSS | Full Size Spare Tire
| Others |
| FSS | Full Stainless Steal
| Others |
| FSS | Full Stainless Steel
| Others |
| FSS | Full Substitution Saturation
| Others |
| FSS | Full Supplier Services
| Others |
| FSS | Full System Simulation
| Others |
| FSS | Fully Separated Subsidiary
| Others |
| FSS | Functional Software Specialist
| Others |
| FSS | Fussball Schule Stalph
| Others |
| FSS | Futrell, Shafer, and Shafer
| Others |
| FSS | Future Sound Scientists
| Others |