Cad Micro: (213) 291-2000
CambridgeSoft Corporation : (617) 491-2200
Candle Corporation : (310) 829-5800
Capital Computer Solutions : (810) 624-3260
CCS Computer Systems : (206)-999-UNIX
CCTI, Inc: (303) 741-0320
Central Data Corporation : (800) 482-0315 or (217) 359-8010
Century Software, Inc. : (212) 943-1010
CERFnet (Support) : (800) 876-2373
Cheyenne Software : (516) 465-4000 or (800) 243-9462
Chisholm Technologies Inc : (512) 834-9962
Cisco Systems, Inc. (Corporate) : (408) 526-4000 or (800) 553-NETS (6387)
Cisco Systems, Inc. (Support) : (800) 553-2447 or (408) 526-7209
Charles River Computers: 212-906-9541
Clary Corporation : (800) 442-5279
CommVault Systems, Inc. : (800) 331-6207
Compass Computer Group : 01635 550660
Computer Classroom, Inc. : (800) 603-8988
Computer Consultation & Sales : (213) 307-9581
Computer Goldmine : (800) 878-5554
Comrise Technology : (908) 739-2330
Consultis : 407-644-7551
Coppick Group : (503) 691-6206
COS, Incorporated : (609) 771-6705
Coastal Business Machines (CBM) : (800) 944-9320 or (888) 2-FIX-UPS
Competitive Automation : (415) 321-4006
computerActive Inc : (613) 225-4824
Computer Associates International, Inc. : (516) DIAL-CAI (342-5224)
Computer Goldmine : (800) 878-5554 or (303) 443-5554
Confluent, Inc : (800) 780-2838 and (415) 586-8700
Continuus Software Corporation : (714) 453-2200
Coryphaeus Software, Inc. : (408) 395-4537
Cray Research, Inc. : (612)452-6650
CraySoft : (800) BUY-CRAY
Creative Digital Research (CDR) : (408) 255-0999
Creative Software Services, Inc.: (800) 770-8649
CrossWind Technologies, Inc. : (408) 469-1780