类别：
- BHC
- BIS
- Bk.
- bldg.
- BMP
- BN
- BO
- BO
- BOM
- BOO
- BOOM
- BOOT
- b.o.p.
- BOT
- BOY
- Br.
- Brok.
- B/S
- B.T.T.
- BV
- C
- C
- C.A.
- C.A.
- C.A.
- C.A.
- C/A
- C.A.D
- cap.
- CAPM
- C.A.S.
- c.b.
- CBD
- C.C.
- C.C
- c/d
- CD
- CG
- CG
- C.H.
- C.H.
- CIA
- C.I.T.
- Ck.
- C.L.
- C/L
- C.M.A.
- CMEA
- CML
- CMO
- CMV
- CN
- CN
- COBOL
- CoCom
- Col.
- Coll.
- Coll.
- cont.
- contr.
- cvt.
- Cor.
- Cor.
- Corp.
- CP.
- C.P.A
- CPM
- CPP
- Cps.
- CPT
- C/R
- Cr.
- CR
- CR
- CR
