FRS

• East Frisian Low Saxon
• Facial recognition system
• Facility registry system
• Family Radio Service
• Family Resources Survey
• Federal Reserve System
• Fellow of the Royal Society
• Ffestiniog Railway
• File Replication Service
• Filtered Rayleigh scattering
• Fire and Rescue Service
• Fisheries Research Services
• Fixed Repeating Schedule
• Flandre Air
• Fleet Replacement Squadron
• Forsinard railway station
• Forum of Social Republicans
• Forward recoil scattering
• Fragment separator
• Frame Relay
• Framingham Risk Score
• Franconia–Springfield station
• Free Record Shop
• Free radical scavenger
• Free radical substitution
• Freely redistributable software
• Frontier Regional School
• Full-rigged ship
• Functional requirement
• Förde Reederei Seetouristik
• Mundo Maya International Airport
• Saterland Frisian
• Toyota 86