• FAL File Access Listener
• FAQ Frequently Asked Question
• FAQs Frequently Asked Questions
• FAT File Allocation Table
• FCBS File Control BlockS
• FCC Federal Communications Commission
• FCI Frame Copied Indicator Bit
• FCS Frame Check Sequence
• FDDI Fiber Data Distributed Interface / Fiber Distributed Data Interconnect
• FDM Frequency Division Multiplexing
• FET Field-Effect Transistor
• fg foreground
• FHSS Frequency-Hopping Spread Spectrum
• FID Format IDentifier
• FIPS Federal Information Processing Standard
• FIX Federal Information EXchange
• FM Function Management
• FMD Function Management Data
• FNC Federal Networking Council
• FOIM Field Office Information Management System
• FORTRAN FORmula TRANslation
• FOSI Format Output Specification Instance
• FPO For Position Only
• fps frames per second
• FPU Floating -Point Unit
• FQDN Fully Qualified Domain Name
• FRC Functional Redundancy Check
• FSF Free Software Foundation
• FSK Frequency Shift Keying
• FSN Full Service Network
• FSR Free System Resources
• FSU File Support Utility
• FT-1 Fractional T-1
• FTA Floptical Technology Association
• FTAM File Transfer Access and Management
• ftp file transfer protocol / file transfer program
• FTS Federal Telecommunications System
• FWIW For What It's Worth
• FYA For Your Amusement
• FYI For Your Information