How to abbreviate Fixed Service

FS - Fixed Service

F - Fixed service

FX - Fixed service
Fixed Service in definitions

FSS - Fixed Service System
FSS - Fixed Service Structure
FSS - Fixed Service Satellites
FSS - Fixed Service Structures

OFS - Operational Fixed Service
AFS - Aeronautical Fixed Service
HDFS - High Density Fixed Service

POFS - Private Operational Fixed Servi…
ITFS - Instructional Television Fixed…