| Subject | English | Thesaurus |
| tradem., abbr. | Alcohol & Drug Testing Services, L. L. C. | ADTS |
| AMEX., abbr. | B L C Financial Services, Inc. | BCL |
| NYSE., abbr. | C. B. Richard Ellis Services, Inc. | CBG |
| Nasdaq, abbr. | C C C Information Services Group, Inc. | CCCG |
| AMEX., abbr. | C E T Environmental Services, Inc. | ENV |
| abbr. | C program | C-language program (ssn) |
| gen. | C S-S Co | Cunard Steam-Ship Company (обслуживает линии между Великобританией и Северной Америкой) |
| abbr. | c.，cd. | candlepower |
| abbr. | 4C-CD | Capital District Child Care Coordinating Council |
| abbr., microel. | C⁴D | conductively connected CCD (Ladungstransfertechnik) |
| abbr., commun. | C/I | carrier /interference ratio |
| abbr., microel. | C³L | complementary constant-current logic |
| abbr. | C-language program | C program (ssn) |
| abbr., commun. | C/N | carrier/noise ratio |
| abbr., microel. | C³RAM | continuously charge-coupled random-access memory |
| railw., abbr. | E C S T Container Services and Trading, GmBH | NABU |
| med. | hepatitis C virus HCV infection | Infection with the hepatitis C virus (HCV). HCV is usually transmitted through blood and rarely through other body fluids, such as semen. HCV infection progresses more rapidly in people coinfected with HIV than in people infected with HCV alone. |
| energ.ind. | I&C Shop | thermal instrumentation and control shop (Kastorka) |
| abbr., med.appl. | I.C.R.P. | International Commission on Radiological Protection |
| abbr., mil., commer. | Joint C4I Command, Control, Communications, Computers and Intelligence Program Assessment Tool | JCPAT (Obsolete, см. KM/DS (Knowledge Management/Decision Support Tool)) |
| railw., abbr. | M R C Rail Services, L. L. P. | MIDX |
| mil., abbr. | NATO AEW & C Program Management Organization | NAPMO |
| railw., abbr. | Pacer Rail Services L. L. C. | PCRX |
| abbr., microel. | p.c.b. | printed circuit board |
| abbr., oil | SE/C | southeast corner |
| mil., abbr. | Theater C2 Initiative Program | TCIP |
| tradem., abbr. | United Government Services, L. L. C. | UGS |
| physiol., abbr. | Virus De La Hepatitis C | VHC |
