English abbreviations from 500bsa to 5nt
- 500BSA (500th Bomb Squadron Association World War II)
- 503PRCTA (503rd Parachute Regimental Combat Team Association)
- 503 RCT (503rd Regimental Combat Team)
- 504MPBA (504th Military Police Battalion Association)
- 505PIVA (World War II Veterans Association of the 505th Parachute Infantry)
- 506AIRA (506th Airborne Infantry Regiment Association)
- 507PIRMF (507th Parachute Infantry Regiment Memorial fund)
- 511PAA (511th Parachute Infantry Association)
- 517 PRCT (517th Parachute Regimental Combat Team)
- 517PRCTA (517th Parachute Regimental Combat Team Association)
- 520FSA (510th Fighter Squadron Association)
- 527FBSA (527th Fighter-Bomber Squadron Association)
- 540ECGA (540th Engineer Combat Group Association)
- 586BSA (586th Bomb Squadron Association)
- 593JASCA (593rd Joint Assault Signal Company Association)
- 596 SSC (596th Signal Support Company)
- 59FSA (59th Fighter Squadron Association)
- 5AFMF (5th Air Force Memorial Foundation)
- 5CCGP (Fifth Combat Communications Group)
- 5GL (Fifth-Generation Programming Language)
- 5-HMF (5-hydroxymethyl-furfural)
- 5M (Machinery, Manpower, Material, Measurement, and Method)
- 5NF (Fifth Normal Form)
- 5NT (Bridge bid to take 11 tricks, No Trump)