FO
See also: Appendix:Variations of "fo"
Translingual
Symbol
FO
English
Noun
FO (plural FOs)
- (aviation) Initialism of first officer.
- Initialism of field officer.
- (logic, computer science) Initialism of first-order logic.
Interjection
FO
- (Internet slang, text messaging, vulgar) Initialism of fuck off.
Adjective
FO (not comparable)
- (civil engineering) Initialism of functionally obsolete (no longer compliant with current standards or capable of handling current requirements)