| Subject | English | Thesaurus |
| Nasdaq, abbr. | A. C. L. N. Limited | ACLNF |
| Nasdaq, abbr. | A C N B Corporation | ACNB |
| Nasdaq, abbr. | A M C O N Distributing Company | DIST |
| abbr. | A.C. | Anno Domini |
| abbr. | A.C. | after Christ |
| abbr., pulp.n.paper | A.C. | aged alkali cellulose |
| abbr., polygr. | A.C. | author's corrections |
| abbr., chem. | A.C. | alternate current |
| abbr., f.trade. | A/C | alternating current |
| abbr., energ.ind. | a.c. fail | power failure (MichaelBurov) |
| abbr., energ.ind. | a.c. fail | power fail (MichaelBurov) |
| abbr., electr.eng. | a.c. fail | a.c. failure (MichaelBurov) |
| abbr., textile | A/C felt | asbestos cement felt |
| abbr., f.trade. | A/C No. | account No. |
| abbr., law | A.C.L.U. | American Civil Liberties Union |
| abbr., polygr. | A.C.P. | Association of Correctors of the Press |
| abbr., law | A.C.T.A. | administrator cum testamento annexo |
| abbr., f.trade. | A.C.W.C. | actual clean wool content |
| abbr., law | A.F.D.C. | Aid to Families with Dependent Children |
| abbr., law | A.F.L.C.LO. | American Federation of Labor and Congress of Industrial Organization |
| abbr., econ. | A.M.C. | air mail center |
| NYSE., abbr. | American General Capital, L L C Preferred N | AGC PN |
| abbr., law | A.P.C. | Alien Property Custodian |
| abbr., mining. | B C. | British Commonwealth |
| Nasdaq, abbr. | B N C Corporation, Inc. | BNCC |
| Nasdaq, abbr. | B N C Mortgage, Inc. | BNCM |
| abbr., textile | B/C | bales of cotton |
| abbr., f.trade. | b.C. | fine but cloudy or thinly cloudy |
| abbr., textile | B2C | Business to Consumers |
| abbr., insur. | B.C. | bill for collection |
| abbr., law | B.C | Before Christ |
| abbr., textile | B&C | black and colors |
| abbr., law | B.C.E. | Baron of the court of Exchequer |
| abbr., f.trade. | B.P.C. | British Pharmaceutical Codex |
| abbr., textile | B-to-C | business-to-consumer |
| abbr., insur. | 4C | consumer, cost, convenience, communication |
| abbr., law | C ACJ | Central American Court of justice |
| abbr., insur. | C. B.D | cash before delivery |
| abbr., math. | c. exp | conditional expectation |
| abbr., seal. | C. I. | cloth-inserted |
| Nasdaq, abbr. | C I E, N. A. Corporation | CIEN |
| abbr., f.trade. | c .i.f.i. | cost, insurance, freight and interest |
| abbr., f.trade. | c .i.f.i.&e. | cost, insurance, freight, interest and exchange |
| NYSE., abbr. | C N A Financial Corporation | CNA |
| NYSE., abbr. | C N A Income Shares, Inc. | CNN |
| NYSE., abbr. | C N B Capital Trust I | BNK PA |
| Nasdaq, abbr. | C N B Financial Corporation | CCNE |
| Nasdaq, abbr. | C N B Financial Corporation of New York | CNBF |
| Nasdaq, abbr. | C N B Holdings, Inc. | CHGD |
| NYSE., abbr. | C N F Transmission, Inc. | CNF |
| NYSE., abbr. | C N H Global, N. V. | CNH |
| Nasdaq, abbr. | C N H Holdings Company | CNHH |
| Nasdaq, abbr. | C N S, Inc. | CNXS |
| Nasdaq, abbr. | C N Y Financial Corporation | CNYF |
| abbr., math. | C. of C. | coefficient of correlation |
| abbr., mil., air.def. | C of M | center of mass |
| abbr., adv. | C print | color print |
| abbr., chem. | C PTA | C plasma thromboplastin antecedent |
| abbr., f.trade. | C. Rica | Costa Rica |
| Nasdaq, abbr. | C T N Media Group, Inc. | UCTN |
| abbr., file.ext. | C Text Mode Image File | CIM (The Ultimate Draw) |
| Nasdaq, abbr. | C U N O, Inc. | CUNO |
| abbr., mining. | C. & W. | coal and wagon |
| abbr., law | C.A | commission agent |
| abbr., mil., air.def. | C/A | coarse/acquisition |
| abbr., law | C.A. | commercial agency |
| abbr., law | C.A.A. | Clean Air Acts |
| abbr., law | C.A.B | Civil Aeronautics Board |
| abbr., law | C.A.F | Cost and freight |
| abbr., insur. | C/AR | capital-to-asset ratio |
| abbr., mining. | C.B. | control desk |
| abbr., law | C.B. | chief baron |
| abbr., pulp.n.paper | C.B. cell. | Cross and Bevan cellulose |
| abbr., mil., air.def. | CBA C | C-band-transponder antenna |
| law | C.B.N.S. | Common Bench Reports |
| abbr., law | C.B.O.E. | Chicago Board of Options Exchange |
| abbr., law | C\C | chamber of commerce |
| abbr., polygr. | c.c. | chapters |
| abbr., textile | C/C | composite carbon/ceramic composite |
| abbr., textile | C/C | composite carbon/carbon fiber composite |
| abbr., textile | C2C | Consumer to Consumer |
| abbr. | c.c. | consumable code |
| abbr. | c.c. | courtesy copy |
| abbr. | c.c. | coordinating committee |
| abbr. | c.c. | complimentary copy |
| abbr. | c.c. | co-ordinating committee |
| abbr. | c.c. | chief commissioner |
| abbr. | c.c. | cancellation clause |
| abbr., publ.secur. | C.C. | consular corps |
| abbr., space | CC, C-C | carboncarbon |
| abbr., textile | C/C type fiber | cover-core type fiber |
| tech. | C-characteristic | Type C characteristic is for general device protection in control circuits (IgBar) |
| construct. | c.c.n. | close copper nailing |
| abbr., f.trade. | C.C.P. | circle circular pitch |
| abbr., mil., air.def. | C/CSYS | command and control system |
| abbr., textile | C/D | cut-off date |
| abbr., mil., air.def. | C&D | communication and data |
| abbr., f.trade. | C.D. | cash deposit |
| abbr., space | C-D | convergent-divergent |
| abbr., textile | C/D | compression deflection |
| abbr., textile | C&D | collected and delivery |
| abbr., span. | C.D.L | conformidad de importación |
| abbr., f.trade. | C.D.P | circumferential diametral pitch |
| abbr., mil., air.def. | C&DS | command and decision system |
| abbr., weld. | C.D.T. | cold-drawn tube |
| abbr., f.trade. | C.D.V. | current domestic value |
| abbr., f.trade. | C.e. | caveat emptor |
| abbr., mil., air.def. | C&E EQP | con munication and electronics equipment |
| abbr., pulp.n.paper | C.E.D. | copperethelenediamine |
| abbr., pulp.n.paper | C.E.S.A. | Canadian Engineering Standards Association |
| abbr., mil., air.def. | C&ESQ | communication and electronics squadron |
| abbr., insur. | C.F | cost and freight |
| abbr., insur. | C.&.F. | cost and freight |
| abbr., insur. | C.F | carried forward |
| abbr., mining. | c.f. | candle foot (feet) |
| abbr., mining. | c.f. | cubic foot (feet) |
| abbr., textile | C/F | continuous filament |
| abbr., f.trade. | C&F border | C&F port discharge plus overland freight to point of entry |
| abbr., textile | C-Fair | Canton Trade Fair |
| abbr., f.trade. | C.FAT | crude fat |
| abbr., insur. | c.f.&c. | cost, freight and commission |
| abbr., textile | C&FC | cost, freight and commission |
| abbr., insur. | C.F.F. | compensatory financing facility |
| abbr., textile | C&FFO | cost and freight free out |
| abbr., law | C.F.I | cost, freight and insurance |
| abbr., polym. | C-fiber | carbon fiber |
| abbr., mining. | c.f.m. | cubic foot per minute |
| abbr., mining. | c.f.s. | cubic foot per second |
| abbr., f.trade. | C.f.t | cubic feet |
| abbr., law | C.F.T.C. | Commodity Future Trading Commission |
| abbr., med. | CFU-C | colony-forming unit culture |
| abbr., law | C.G.S.A. | Carriage of Goods by Sea Act |
| abbr., polygr. | -CH2-CHOCO-CH=CH-C6H5-n | polyvinylcinnamate |
| abbr., perf. | C37H34N2Na2O9S3 | Erioglaucin (Александр Стерляжников) |
| abbr., expl. | C3H6N6O6 | Research Department explosive (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | hexogen (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | Research Department Formula X (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | cyclotrimethylenetrinitramine (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | cyclotrimethylene trinitramine (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | cyclotrimethylene-trinitramine (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | cyclo-trimethylenetrinitramine (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | cyclo trimethylenetrinitramine (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | cyclonite (MichaelBurov) |
| abbr., expl. | C3H6N6O6 | RDX (MichaelBurov) |
| abbr., publ.secur. | C₂H₂OH | ethanol |
| abbr. | C17H21O4N | cocaine (MichaelBurov) |
| abbr. | C17H19O3N | morphine (MichaelBurov) |
| abbr. | C17H19O3N | Mo (MichaelBurov) |
| abbr., blast.furn. | C.I. | cast iron (nikolkor) |
| abbr., insur. | C.I | cost and insurance |
| abbr., f.trade. | C/I | cash interest |
| abbr., insur. | C.&I | cost and insurance |
| abbr., insur. | C.I.F | cost, insurance and freight |
| abbr., econ. | C.I.F. | cost、 insurance、 freight |
| abbr., insur. | c.i.&f | cost, insurance and freight |
| abbr., insur. | C.I.&F. | cost, insurance and freight |
| abbr., jewl. | C.I.F. | cost, insurance, and freight |
| abbr., insur. | C.I.F & E. | cost, insurance, freight & exchange |
| abbr., law | C.I.F.& net | Cost, insurance, freight net |
| abbr., insur. | C.I.F.&C. | cost, insurance, freight & commission |
| abbr., law | C.I.F.C. &.I. | Cost, insurance, freight commission and interest |
| abbr., law | C.I.F.liner terms | Cost, insurance, freight liner terms |
| abbr., law | C.I.O. | Congress of Industrial Organization |
| abbr., logist. | C.I.P. | carriage and insurance paid to (spanishru) |
| abbr., law | C.I.S. | Community of Independent States |
| abbr., law | CJ.C.P. | Chief justice of the Common Pleas |
| abbr., law | C.J.C.P. | Chief justice of the common pleas |
| abbr., law | C.J.K.B. | Chief Justice of the King's Bench |
| abbr., law | C.J.Q.B. | Chief Justice of the Queen's Bench |
| abbr., f.trade. | C.l. | consular invoice |
| abbr., f.trade. | C.l.A. | cash in advance |
| abbr., space | C-LAS | C-band lightweight acquisition system |
| avia. | Class C airspace | IFR and VFR flights are permitted, all flights are provided with air traffic control service and IFR flights are separated from other IFR flights and from VFR flights. VFR flights are separated from IFR flights and receive traffic information in respect of other VFR flights. |
| abbr., adv. | c/lc | c and lc |
| abbr., law | C.LF | cost, insurance and freight |
| abbr., jewl. | C.LF. | cost, insurance, and freight |
| abbr., law | C.LF. cleared | Cost insurance, freight cleared |
| abbr., law | C.LF. ex ship's hold | Cost, insurance, freight |
| abbr., law | C.LF. inland waterway | Cost, insurance, freight inland waterway |
| abbr., law | C.LF. under ship's tackle | Cost, insurance, freight under ship's tackle |
| abbr., law | C.LF&C. | cost, insurance, freight and commission |
| abbr., law | C.LF.&E. | cost, insurance, freight and exchange |
| abbr., law | C.LF.&I. | cost, insurance, freight and interest |
| abbr., law | C.LF.&W. | cost, insurance, freight and war risk |
| abbr., law | C.LF.&W.R. | Cost, insurance, freight and war risk |
| abbr., law | C.LO. | Congress of Industrial Organization |
| tech., abbr. | closed C-MOS logic | C2L |
| insur. | c.l.s.h. | closed shelter decker |
| abbr., law | C.L.U. | Chartered Life Underwriter |
| abbr., econ. | C.M. | Certificated Master |
| abbr., econ. | C.M.B. | coastal motor boat |
| abbr., f.trade. | C.M.Si | combined marine surcharge |
| tech. | C&N | communications and navigation |
| abbr., commun. | C/N | carrier/noise ratio |
| law | C/N | cover note |
| insur. | C/N | covernote |
| abbr., mil. | C4N | Command, Control, Communications, Computers & Navigation |
| energ.ind. | C/N | contract note |
| energ.ind. | C/N | circular note |
| tech. | C/N | carrier-to-noise |
| abbr., mil., air.def. | C/N | clutter-to-noise ratio |
| tech. | C:N | organic carbon: nitrogen ratio |
| tech. | C/N | carrier-to-noise ratio |
| abbr., f.trade. | c/n | circular notes |
| tech. | C&N LAB | Communication and Navigation Laboratory |
| abbr., mil., air.def. | C/N max | maximum clutter-to-noise ratio |
| abbr., chem. | C/N ratio | carbon/nitrogen ratio |
| energ.ind. | C.N.E.N. | Comitato nazionale per l'energia nucleare |
| abbr., polygr. | C.N.J. | copper-nickel jacket |
| abbr., f.trade. | C/No. | case No. |
| tech. | C.N.S. | control net system |
| abbr. | C.O. | Central Office |
| abbr. | c/o | Carbon monoxide |
| abbr. | c/o | chill out |
| abbr. | c/o | conscientious objector |
| abbr. | c/o | commanding officer |
| abbr. | c/o | Central Office |
| abbr. | C.O. | chill out |
| abbr. | C.O. | care of |
| abbr., insur. | C.O. | certificate of origin (c.o.) |
| abbr. | C.O. | Carbon monoxide |
| abbr., commer. | C.O. | commercial operation |
| abbr., law | C.O.D. | Cash on delivery/Collect on delivery |
| abbr., textile | C/P | contact price |
| abbr., textile | C&P | coat and pants |
| abbr., textile | C/PP | cotton/polypropylene |
| abbr., mil., air.def. | C/R | communication and reconnaissance |
| abbr., mil., air.def. | C-RCIED | counter radio controlled improvised explosive device |
| abbr., mil., air.def. | CRF C | C-band radar frequency |
| abbr., f.trade. | C.R.M | cash on receipt of merchandise |
| abbr., f.trade. | C.R.M | cash by return mail |
| abbr., med. | C.R.S. | congenital rubella syndrome (Alex_Odeychuk) |
| abbr. | C.R.T | crisis response team (driven) |
| abbr., mil., air.def. | CRT C | C-band radar transponder |
| abbr., mil., air.def. | C/S | call signal |
| abbr., textile | C/S | cost of sale |
| abbr., pulp.n.paper | C.S. freeness | Canadian Standard Freeness |
| abbr., f.trade. | c/s No. | case number |
| insur. | C's of credit | character, capacity, capital, collateral, conditions |
| abbr., law | C.S.C. | civil service commission |
| abbr., f.trade. | C/SMPL | countersample |
| abbr., f.trade. | C.T. | combined transport |
| abbr., f.trade. | C/T | contract |
| abbr., f.trade. | C-T | continuous thread |
| abbr., f.trade. | C.t.I.O. | constructive total loss only |
| abbr., f.trade. | c'tn | carton |
| abbr. | C.V. | commercial vehicle |
| abbr., mil., air.def. | C&V | correction & verification |
| abbr., adv. | C&W | country and western |
| abbr., pulp.n.paper | C.W.P. | chemical wood pulp |
| abbr., insur. | C.Y | currency |
| abbr., insur. | C.Y. | currency |
| abbr., med. | D and C | dilatation and curettage |
| abbr., astr. | D. C. | direct current |
| abbr., insur. | DB & C | dwelling, buildings and contents insurance |
| abbr. | DB2 C/S | DataBase 2 Client/Server (IBM, DB2, DB) |
| abbr., chem. | DB18C6 | dibenzo-18crown-6 |
| abbr., insur. | DB&C | dwelling, building and contents insurance |
| abbr., f.trade. | D/C | direct current |
| abbr., pulp.n.paper | D.C. | double coated |
| abbr., law | D.C. | district courts |
| abbr., textile | D&C brand | designer and character brand |
| abbr., textile | D&C Dyes | drugs and cosmetics dyes |
| tech., abbr. | density at 20°C referred to water at 4°C | D20/4 |
| abbr., insur. | D.O.C | endorsement drive other cars endorsement |
| abbr., insur. | D.O.C. | clause drive-other-cars clause |
| abbr., insur. | D.O.C. clause | drive-other-cars clause |
| abbr., insur. | D.O.C endorsement | drive other cars endorsement |
| abbr., auto. | D+R C | valve for direct and reverse clutch |
| Nasdaq, abbr. | E N C A D, Inc. | ENCD |
| abbr., law | E/C | Electronic commerce |
| abbr., textile | E/C | Eye Clips |
| abbr., f.trade. | e.c.d. | electron-capture detector |
| abbr., f.trade. | E.C.No | Enzyme Commission Number |
| abbr., law | E.E.O.C | Equal Employment Opportunity Commission |
| abbr., polygr. | E.M.C. | equilibrium moisture content |
| Nasdaq, abbr. | F C N B Capital Trust | FCNB |
| Nasdaq, abbr. | F N C B Capital Trust Preferred | FCNBP |
| abbr., publ.secur. | F.A.C. | firearms acquisition certificate |
| abbr., law | F.C.A. | Federal Credit Administration |
| abbr., law | F.C.A. | Farm Credit Administration |
| abbr., law | F.C.C. | Federal Communications Commission |
| abbr., law | F.C.I.C. | Federal Crop Insurance Corporation |
| abbr., law | F.C.LC. | Federal Crop Insurance Corporation |
| abbr., econ., insur. | F.C.&S. | free of capture and seizure |
| abbr., f.trade. | f.c.s.r.c.c. | free of capture, seizures, riots and civil commotions |
| abbr., f.trade. | FD&C | Food, Drug and Cosmetic (Act) USA |
| radio, abbr. | Festival hosted by WHFS, FM-99.1, Washington, D. C. | HFSTIVAL |
| abbr., textile | FIDA-c | chelating filamentary cloth |
| abbr., f.trade. | F.O.C | free of charge (现略作 free) |
| abbr., insur. | F.O.C. | free of charge (f.O.C.) |
| abbr., f.trade. | f.r. & c.c. | free of riots and civil commotion |
| med. | F.R.C.Path | Fellow of the Royal College of Pathologists (Rive) |
| abbr., f.trade. | F.R.E.C | fire risk extension clause |
| railw., abbr. | Freeman Gas of N.C. Incorporated | BOBX |
| abbr., law | F.T.C | Federal Trade Commission |
| railw., abbr. | G.C.A. Transport Limited | GCAU |
| abbr., mil., air.def. | GEOS-C | geodetic Earth Orbiting satellite-C |
| abbr., insur. | G.F.C.F. | gross fixed capital formation |
| abbr., f.trade. | g.l.c | gas-liquid chromatography |
| abbr., f.trade. | g.s.c. | gas-solid chromatography |
| Nasdaq, abbr. | H F N C Financial Corporation | HFNC |
| Nasdaq, abbr. | H N C Software, Inc. | HNCS |
| abbr., chem. | H. U.C. R. | highest useful compression ratio |
| abbr., mil., air.def. | H/C | helicopter control center |
| abbr., f.trade. | H/c | held covered (i.e. at discretion of the underwriters) |
| abbr., econ. | H.M.C. | Her Majesty's Customs |
| abbr., f.trade. | HT CLEAN C | hold and tank cleaning charges |
| NYSE., abbr. | I C N Pharmaceutical, Inc. | ICN |
| Nasdaq, abbr. | I C T S International, N. V. | ICTS |
| Nasdaq, abbr. | I O N A Technologies, P. L. C. | IONA |
| abbr., space | I&C | instrumentation and communication |
| abbr., shoot. | I.C. | improved cylinder |
| abbr., f.trade. | I.C.C. | Intemational Chamber of Commerce |
| abbr., f.trade. | I.C.I. | less (than) carload |
| abbr., law | I.C.O.R | Incremental capital-output ratio |
| abbr., R&D. | IEEE M-C | IEEE Computer (MichaelBurov) |
| abbr., law | I.R.C | Internal Revenue Code |
| abbr., f.trade. | I.U.C. | Intemational Union of Chemistry |
| abbr., econ. | I.U.C.N. | International Union for Conservation of Nature and Natural Resources |
| abbr., agric. | I.W.C. | International Wool Secretariat |
| abbr., mil., air.def. | J/C | jammer cancellation ratio |
| abbr., law | K.C. | Queen's Council |
| abbr., law | K.C. | King's (or Queen's) Council |
| abbr., law | K.C. | King's Council |
| Nasdaq, abbr. | L I N C Capital, Inc. | LNCC |
| abbr., proj.manag. | LACTI stands for L- Leads Task, A- Approves task work product, C - Consulted on task, T- Tasked to do the work, I- Informed of the work product. | LACTI Chart (L – руководит задачей; A – утверждает результат; C – консультирует по задаче; T – несет ответственность за исполнение задачи; I – ставится в известность о результате Pani) |
| abbr., f.trade. | L.C. | liquid chromatography |
| abbr., law | LC.C. | Interstate Commerce Commission |
| abbr., tech. | L.C.-cable | lead-covered cable |
| abbr., law | L.H.W.C.A. | Longshoremen's and Harbor Workers' Compensation Act |
| abbr., econ. | l.m.s.c. | let me see correspondence |
| abbr., law | LR.C. | Internal Revenue Code |
| NYSE., abbr. | M B N A Capital C | KRB PC |
| NYSE., abbr. | M C N Energy Group, Inc. | MCN |
| NYSE., abbr. | M C N Energy Group, Inc. | MCE |
| NYSE., abbr. | M C N Energy Group, Inc. Preferred I | MCN PI |
| NYSE., abbr. | M C N Financing I | MCN PA |
| NYSE., abbr. | M C N Financing II | MCN PS |
| NYSE., abbr. | M C N Michigan Limited Partnership Preferred T | MCN PT |
| tradem., abbr. | Mark B. Stumer & Associates, P. C. | MBSA |
| abbr., auto. | M-C | maximum-conjugacy |
| abbr., R&D. | M-C | IEEE Computer (MichaelBurov) |
| abbr., auto. | M/C | mixture control solenoid |
| abbr., photo. | M.C.C. | miniature bayonet |
| abbr., photo. | M.C.C. | Miniature Centre Contact |
| abbr., econ. | M.C.L. | Master of Civil laws |
| tech., abbr. | mean translational energy of molecule of ideal gas at 0°C | Eo |
| abbr., f.trade. | M.E.C. | marine extension clause (insurance) |
| abbr., law | M.H.C. | Member of the House of Commons |
| law, abbr. | Moo.P.C.N.S. | Moore's Privy Council Cases |
| law | M.P.C.N.S. | Moore's Privy Council Cases |
| abbr., f.trade. | M.T.C/I | moment to change trim one centimeter or one inch |
| NYSE., abbr. | N B C I Automatic Commercial Exchange | NIE |
| Nasdaq, abbr. | N B C Internet, Inc. | NBCI |
| railw., abbr. | N C A Leasing Company - Division of G. H. Leasing Corporation | NCAZ |
| Nasdaq, abbr. | N C C Industries, Inc. | NCCDQ |
| NYSE., abbr. | N C H Corporation | NCH (formerly National Chemsearch Corporation) |
| NYSE., abbr. | N C L Holding, A S A | NRW |
| Nasdaq, abbr. | N C O Group, Inc. | NCOG |
| NYSE., abbr. | N C R Corporation | NCR |
| abbr., pulp.n.paper | N C. R paper | no carbon required paper |
| Nasdaq, abbr. | N C S Healthcare, Inc. | NCSS |
| Nasdaq, abbr. | N C T Group, Inc. | NCTI |
| tradem., abbr. | N C Tool Setting | TSET |
| railw., abbr. | N D C Railroad Company | NDCR |
| Nasdaq, abbr. | N I C E Systems, LTD. | NICE |
| Nasdaq, abbr. | N P C International, Inc. | NPCI |
| abbr., tech. | N.A.C.A. | National Advisory Committee for Aeronautics |
| abbr., oil | N.A.C.E. | National Association of Corrosion Engineers |
| abbr., scottish | N/C | Normally Closed |
| abbr., el. | N/C | NC |
| abbr., fin. | n.c. | net capital |
| abbr., electric. | n.c. | normally closed |
| abbr., expl. | N.C. | nitro-cellulose |
| abbr., econ. | n.c. | no commercial value |
| abbr. | N/C | no charge (Vosoni) |
| abbr., auto. | N/C | neutral start switch (A/T) clutch switch (M/T) |
| abbr., auto. | N.C. | normally closed position |
| abbr., BrE | N.C. | Notes of Cases (Ecclesiastical and Maritime) |
| abbr., Makarov. | N.C. | numerical control |
| abbr. | n.c. | no change (Vosoni) |
| abbr. | n.c. | non-condensing |
| abbr. | N.C. | North Carolina Session Laws |
| abbr., IT | N/C | numerical control |
| abbr. | N.C. | North Carolina Reports |
| abbr., geogr. | N.C. | North Carolina (Vosoni) |
| polym. | n.c. | noncondensing |
| econ. | n/c | no charge (бесплатно Yuriy83) |
| construct. | n.c. | non condensing |
| abbr., avia. | N₂c | corrected N₂ speed |
| abbr., econ. | n.c. | no connection |
| abbr., insur. | N.C. | no charges |
| law | N.C.App. | North Carolina Court of Appeals Reports |
| abbr., f.trade. | N.C.B. | no cargo on board |
| law | N.C.Bar. | North Carolina Bar |
| law | N.C.Cent.L.J. | North Carolina Central Law Journal |
| law | N.C.D. | Nemine contra dicente |
| law | N.C.Gen.Stat. | General Statutes of North Carolina |
| law | N.C.L.Rev. | North Carolina Law Review |
| abbr., f.trade. | N.C.P. | normal circular pitch |
| law | N.C.S.B. Quarterly | North Carolina State Bar Quarterly |
| abbr., el. | n-c-SiO2 | neutron-irradiated crystalline quartz |
| law | N.C.Term R. | North Carolina Term Reports |
| abbr., textile | N/C/W | not complied with |
| abbr., nautic. | N.E.C. | non elsewhere classified |
| abbr., met. | N.M.C. | nickel-manganese-chromium |
| abbr., bank. | n.m.c. | no more credit |
| abbr., met. | N.M.C. steel | nickel-manganese-chromium steel |
| abbr., econ. | n.o.c. | not otherwise classified |
| abbr., insur. | NOW a/c | Negotiable Order of Withdrawal |
| abbr., earth.sc. | N.P.C. | Normal Portland Cement |
| abbr. | N.P.C. | Nisi Prius Cases |
| abbr., oil | N.P.C. | National petroleum Council |
| abbr., earth.sc. | N.P.C.F. | National Pollution Control Foundation |
| abbr. | N.R.C. | National Research Council |
| abbr., mining. | N.R.C. | Native Recruiting Corporation |
| abbr., earth.sc. | N.R.C.C. | National Research Council of Canada |
| abbr., earth.sc. | N.R.D.C. | National Research Development Corporation |
| abbr., pulp.n.paper | N.S.S.C. | neutral sulphite semi-chemical |
| abbr., pulp.n.paper | N.S.S.C. pulp | neutral sulphite semi-chemical pulp |
| abbr., earth.sc. | N.T.C. | negative temperature coefficient |
| law | N.Y.City C. | New York City Court |
| law | N.Y.L.C.Ann. | New York Leading Cases Annotated |
| Nasdaq, abbr. | O C E, N. V. | OCENY |
| abbr., law | O.C. | opere citato |
| abbr., law | O.C.A.S. | Organization Central American States |
| abbr., adv. | OK w. c. | okay with corrections |
| abbr., law | O.T.C. | over-the-counter |
| chem., abbr. | OXamic Acid, C2 H4 N1 O2 | OXM |
| NYSE., abbr. | P N C Bank Corporation Preferred C | PNC PC |
| NYSE., abbr. | P N C Bank Corporation Preferred D | PNC PD |
| abbr., insur. | P O.C. | port of call |
| abbr., textile | PAM&C | processing of given materials, assembling provided components, made to order against buyer's sample and compensating trade |
| abbr., law | P.C. | privy councilor |
| abbr., HR | P&C | People and Culture (Rada0414) |
| abbr., f.trade. | p.c. | per-cent |
| abbr., textile | P-C | a blended fabric of polyester and cotton fibers |
| abbr., law | P.C | price current |
| abbr., insur. | p.c | per centum |
| abbr., jewl. | p.c. | per-carat |
| abbr., f.trade. | P.C.B. | printed-circuit-board |
| abbr., econ. | p.c.m. | per calendar month |
| abbr., law | P.U.C. | public utility commission |
| Nasdaq, abbr. | R C N Corporation | RCNC |
| abbr., textile | R/C | Reclassed by Co, |
| abbr., mil., air.def. | R/C | receipt/compliance |
| abbr., f.trade. | R.C. | revolving credit |
| abbr., auto. | R/C | reverse clutch |
| tech. | R.C.N.R.C | Royal Canadian Navy reserve communications |
| abbr., law | R.F.C.A. | Reconstruction Finance Corporation Act |
| abbr. | round C/P | Round charter party |
| abbr., law | R.S.C. | Rules of the Supreme Court of England and Wales |
| abbr., f.trade. | R.S.W.C. | BRIGHT SIDE (UP) , WITH CARE |
| abbr., pulp.n.paper | S. and S.C. | sized and supercalendered |
| abbr., f.trade. | S. en. C. | Societe en Commandite |
| abbr., econ. | S.C. | Societe en Commandite par Actions |
| abbr., polygr. | S.C. | supercalendered |
| abbr., pulp.n.paper | S.C. | supercalandered |
| abbr., textile | S/C | supplier's credit |
| abbr., f.trade. | S.c. | service certificate |
| abbr., pulp.n.paper | S.C. | sized and calendered |
| abbr., textile | S&C | shiper and carrier |
| abbr., f.trade. | s.c.e | saturated calomel electrode |
| abbr., f.trade. | S.en.N.C. | Societe en Nom Colectif |
| abbr., f.trade. | S.R.C.C | strikes, riots and civil commotions |
| abbr., busin. | S.R.&.C.C. | strikes, riots and civil commotions |
| abbr., law | S.R.C.C.R. | Strikes, riots and civil commotion risks |
| abbr., law | S.R.C.C.R | strikes, riots and civil commotion risks |
| abbr., mech.eng. | SS and s.c. lathe | sliding, surfacing and screw cutting lathe |
| abbr., f.trade. | S.S.&C. | same sea and country |
| abbr., insur. | Super NOW a/c | Super Negotiable Order of Withdrawal |
| abbr., textile | T/C | washer jacket |
| abbr., mil., air.def. | T/C | telecommunication |
| abbr., agric. | T.c. | triple-crown |
| abbr., textile | T/C | trueran/cotton |
| abbr., f.trade. | T.C. | telegram collation |
| abbr., textile | T/C | tyre cord |
| abbr., textile | T/C | poplin coated jacket |
| abbr., f.trade. | T.C.K. | Tilletia controversa kuhn |
| abbr., space | TLAM/C | Tomahawk land attack missile with conventional warhead |
| abbr., f.trade. | t.l.c. | thin-layer chromatography |
| abbr., tech. | Type C characteristic is for general device protection in control circuits | C-characteristic (IgBar) |
| abbr., law | U.C.C.C. | Uniform Consumer Credit Code |
| abbr., law | U.C.C.J.A. | Uniform Child Custody Jurisdiction Act |
| abbr., law | U.C.M.J. | Uniform Code of Military Justice |
| abbr., law | U.C.R. | Uniform Crime Reports |
| abbr., agric. | U.N.C.O.D. | Unites Nations Conference on Desertification |
| abbr., f.trade. | U.S.A.E.C. | United States Atomic Energy Commission |
| law | U.S.C.C. & A.N. | United States Code Congressional and Administrative News |
| abbr., f.trade. | v.c. | vinyl chloride |
| abbr., f.trade. | v.c. | vice consul |
| abbr., law | V-C. | vice chancellor |
| abbr., textile | W/C | woolen cut |
| abbr., f.trade. | W.C.B | with cargo on board |
| abbr., econ. | w.c.c.o.n. | whether customs cleared or not |
| abbr., f.trade. | W.R. & S.R. & C.C. | war risk and strikes, riots, and civil commotion (insurance) |
| abbr., insur. | x.c. | excapitalization |
| abbr., insur. | x.c | ex coupon |
| abbr., file.ext. | YUV12C M- Motion Frame Buffer Video file Bitmap graphics | VID |