English abbreviations from 401bga to 4w
- 401BGA (401st Bombardment Group (Heavy) Association)
- 406FGMF (406th Fighter Group World War II Memorial Foundation)
- 407 RRD (407th Radio Research Detachment)
- 409BGA (409th Bomb Group Association)
- 40BGA (40th Bomb Group Association)
- 41IDA-MI (41th Infantry Division Association Michigan Chapter)
- 426NFSA (426th Night Fighter Squadron Association)
- 432ECBA (432nd Engineer Construction Battalion Association)
- 43BGA (43rd Bomb Group Association)
- 440TCGA (440th Troop Carrier Group Association)
- 442 RCT (442nd Regimental Combat Team)
- 442RCTF (442nd Regimental Combat Team Foundation)
- 446BGA (446th Bomb Group Association)
- 449BGA (449th Bomb Group Association World War II)
- 44ECB-K (44th Engineer Combat Battalion - Korea)
- 452BGA (452nd Bomb Group Association World War II)
- 454BGA (454th Bombardment Group Association)
- 45IDAEF (45th Infantry Division Association Education Fund)
- 460BGS (460th Bomb Group (Heavy) Society)
- 461BGHA (461st Bomb Group (Heavy) 1943-1945 Association)
- 464BGA (464th Bomb Group Association)
- 46PAVRB (46th Pennsylvania Volunteer Regiment Band - Logan Guard)
- 47 (Agent 47, Hitman)
- 474FGA (474th Fighter Group Association World War II)
- 475FGHA (475th Fighter Group Historical Foundation)
- 483BGA (483rd Bombardment Group (Heavy) Association)
- 486 (Intel 80486 processor)
- 486BGA (486th Bomb Group Association)
- 48 FW (48th Fighter Wing)
- 491BGH (491st Bombardment Group (Heavy))
- 494BGA (494th Bombardment Group (Heavy) Association)
- 49ADHF (49th Armored Division Historical Foundation)
- 4B5BLF (4 Byte 5 Byte Local Fiber)
- 4C (Child Care Coordinating Council)
- 4CC (Four-Character Code)
- 4C-CD (Capital District Child Care Coordinating Council)
- 4C-NYS (Child Care Coordinating Council of New York State)
- 4C-SMC (Child Care Coordinating Council of San Mateo County)
- 4D (multiple 3Ds overlapping each other (geophysics))
- 4GET (Forget)
- 4GL (Fourth-Generation Programming Language)
- 4IBUMF-B (B Company 4th Infantry Battalion USMCR (United States Marine Corps Reserve) Memorial Fund)
- 4ID (4th Infantry Division)
- 4NF (Fourth Normal Form)
- 4NT (Bridge bid to take 10 tricks, No Trump)
- 4P4T (Quad-Pole Quad-Throw)
- 4SR (Fourth Year Senior)
- 4USLAI-A (Cushings Battery A 4th United States Light Artillery and Infantry)
- 4W (4-Watt Resistor)
- 4-W (4-Wire)