active Federal service

Federal Protective Service

Federal Security Service of the Russian Federation (FSB)

federal service

work in the mail room of Germany's Federal Intelligence Service

separate from active service / the service

Federal Aviation Regulation (FAR)

Federal Bureau of Investigation (FBI)

Federal Emergency Management Agency (FEMA)

FEDCON (Federal Employees and Contractors only)

Federal Aviation Administration (FAA)

Federal Aviation Regulations (FARs)

active military service

active service/ duty

active list service

active commissioned service

active enlisted service

active service

active service credit

branch (military/service branch, armed service)

Y service (Y-service) / Y-station

regional meteorological service/ regional weather service (RWS)

emergency service / emergency operations service

active camouflage

active combat area

active component

active component headquarters

active counterintelligence measures

active countermeasures

active deception measures

active decontamination

active defenses

active denial system