F
  FAC First Aid Case
  FACTS Fatigue Cracks Growth Software
  FAGS  Federation of Astronomical and Geophysical Data Analysis Services website
  FAI Flow Alarm Indicator
  FAL Flow Alarm Low
  FAR  Fatal Accident Rate 
  FARM Flare And Relief Modification 
  FAS Forged Alloy Steel
  FASB Financial Accounting Standards Board
  FAT Factory Acceptance Test
  FATO Final Approach and Take Off area
  FATP Factory Test Pressure
  FB Fire Brigad
  FBE Fusion Bonded Epoxy
  FBH Flat Bottom Hole
  FBS Foundation and Bottom Structure
  FC Failure code
    Fiber Cable  
    Field Craft 
    Fire Control
    Flood/flow Control 
    Full Certification 
    Fully Connected 
    other meanings according to context
  FCAW Flux Cored Arc Welding
  FCAW-GS Flux Cored Arc Welding with Shielding Gas
  FCAW-SS Flux Cored Arc Welding without Shielding gas
  FCC Fully Cellular Containership 
  FCI Fluid Components International (company) 
  FCO Financed, Constructed and Operated 
  FCS Forged Carbon Steel
    Functional Design Specification 
  FCM  Flow Control Module 
  FCU Feeder Control Unit
  FCV Flow Control Valve
  FCW Full Control of Well
  FD Full Diameter
  FDDI Fiber Distributed Data Interface
  FDIS Final Draft International Standard (ISO)
  FDMA Frequency Division Multiple Access
  FDPSO  Floating, Drilling, Processing, Storage and Offloading (vessel )
  FDS  Field Development Ship 
  FE Finite Element
  FEA Finite Element Analysis
  FED Final Energy Demand
    Front End Design
  FEED Front End Engineering and Design
  FEIS Final Environmental Impact Statement
  FELCC Firm Energy Load Carrying Capability
  FEM Fédération Européenne de la Manutention
  FEMA Federal Emergency Management Agency (USA)  website
  FEP Front End Processor
  FERA  Fire and Explosion Risk Analysis 
  FERC Federal Energy Regulatory Commission (USA)  website
  FF Flat Face
  FFD Full Field Development
  FFFP Films Forming Fluoro-Proteins
  FFT   Fast Fourier Transform (algorythm)
  F-FTP Foiled Foiled Twisted Pair
  F&G Fire and Gas
  FGS Fire and Gas System
  FIA   Forging Industry Association (USA) website 
  FIC Facility Interface Code
    Fault Isolation Control
    Fiber Interface Card
    Flame Ignition Chamber
    Flow Indicator Control
    Frame Identification Code 
    Full Installation Certification
  FID Financial Investment Decision 
  FiFi Fire Fighting
  FIFO  First In, First Out 
  FIRTO Fire Insurer's Research and Testing Organisation
  FIT Formation Integrity Test
  FJ  Flush Joint
  FJC Field Joint Coating
  FL  Fusion Line 
  FLNG  Floating Liquid Natural Gas (production system) 
  FLP FlowLine Pressure
  FLT FlowLine Temperature
  FM Field Manager
    Fracture Mechanics
  Frequency Modulation
  FMC Factory Mutual Corporation
  FMCEA  Failure Mode Cause & Effect Analysis 
  FMD  Flooded Member Detection 
  FMEA Failure Mode &  Effect Analysis 
  FMECA Failure Mode, Effect and Criticality Analysis
  FMIRR  Failure Mode Identification and Risks Ranking
  FMU Feeder Management Unit
  FO Field Operation
    Fuel Oil 
  FOB Franco Out Board 
  FOC  Fiber Optic Cable 
  FOET  Further Offshore Emergency Training 
  FON  Fiber Optic Network 
  FOPS  Floating Offshore Production System
  FoS  Factor of Safety 
  FOSC  Federal On-Scene Co-ordinator (USA) website
  FOST  Fast Oil Spill Team (operational base in Marseille, France)
  FP Fusible Plug
    Final Pressure 
  FPA Federal Power Act (USA)  webpage
  FPC Federal Power Commission (USA) replaced by FERC
  FPD  Fall Prevention Device 
  FPDSO Floating Production Drilling Storage and Offloading 
  FPF Floating Production Facility 
  FPP Floating Production Platforms 
  FPS Floating Production System 
  FPSO  Floating Production Storage and Offloading 
  FPU Floating Production Unit 
  FRA Forward Rate Agreement (financial)
    Flood Risk Assessment 
    Frequency Response Analysis 
  FRC Fast Rescue Craft 
  FRED Fire, Release, Explosion & Dispersion models (Shell) 
    Flexible Risk Exposure Database 
  FROSIO Norwegian institute for certification in protective coatings for construction materials
  FRP Fiber Reinforced Polyesther 
  FS Full Scale
  FSA  Formal Safety Assessment 
  FSC Fail Safe Circuit / Closed
    Flag State Control (maritime shipping)
    Fuel System Controller
    Full Service Contractor
    Full Systems Capability  
    Functional System Concept 
  FSH  Fond de Soutien aux Hydrocarbures (french fund for hydrocarbons related projects)
    Full Screen Height
    Flow Switch High
  FSHH Ferrous Sulphate HeptaHydrate
    Flow Switch High High
  FSK Frequency Shift Keying 
  FSLL Flow Switch Low Low
  FSM Free Surface Moment (ship stability value)
  FSO Floating, Storage and Offloading
  FSRU Floating, Storage and Re-gasification Unit 
  FST Flow line connector Seal Test
    Forged Steel 
  FSV Flow Safety Valve
  Field Support Vessel
  FSVAD Flag State Verification and Acceptance Document (marine vessels)
  FTA Field Termination Assembly
  FTB Field Terminal Block 
  FTC Faverdale Technology Center (British Gas, UK)
    Federal Trade Commission (USA)  website
    Field Terminal Cabinet
  FTD Flowline To Disposal
  FTG  3D Full Tensor Gradiometry
  FTHP  Flowing Tubing Head Pressure 
  FTP Foiled Twisted Pair
    File Transfer Protocol 
  FTS Functional Test Sheet 
    Fixed Terminal System
    Frequency Time Standard
  FUA Power Plant and Industrial Fuel Act of 1978 (USA)  webpage
  Fund 71  International Convention on the Establishment of an International Fund
for Compensation for Oil Pollution Damage, 1971 webpage 
  Fund 92  1992 Protocol to the International Convention on the Establishment of an
International Fund for Compensation for Oil Pollution Damage (1971 ) webpage
  FWADC Fixed Wing Aerial Dispersant Capability (Australia) 
  FWT Full Wellstream Tieback
  FXO Foreign Exchange Office
  FXS Foreign Exchange Station
  FYI  For Your Information