- Casio SL-702C
- Casio SL-704
- Casio SL-750
- Casio SL-760
- Casio SL-760LB
- Casio SL-8
- Casio SL-80
- Casio SL-800
- Casio SL-801
- Casio SL-805B
- Casio SL-807
- Casio SL-821
- Casio SL-831
- Casio SL-900
- Casio SL-950
- Casio SL300VC-BE
- Casio SL300VC-GN
- Casio SL300VC-OE
- Casio SL300VC-PK
- Casio SL300VC-PL
- Casio SL300VC-YW
- Casio SR-1
- Casio SR-5
- Casio SR5-BK
- Casio ST-1
- Casio ST-24
- Casio SX1050V
- Casio UC-365
- Casio VL-1
- Casio VL-10
- Casio VL-80
- Casio XJ-A141
- Casio XJ-A146
- Casio XJ-A241
- Casio XJ-A246
- Casio XJ-A251
- Casio XJ-A256
- Casio XJ-H1750
- Casio XJ-H2600
- Casio XJ-H2650
- Casio XJ-ST145
- Casio XJ-ST155
- CASIO-8E
- CASIO-8U
- Caspa FS
- Caspa VL
- CAST
- Cast Iron Systems
- CAST Software Ltd.
- Castle Technology (RISC OS Open Ltd)
- Catalog Software & Computer Systems
- Catapult Systems Corp.
- CATIA
- Cavium, Inc.
- Caxy Interactive
- Cbeyond, Inc.
- CBMI
- CBORD Group, The
- Cbrreader
- CBS Interactive
- CBTS
- CCC Information Services Inc.
- CCEnhancer
- CCH (Commerce Clearing House)
- CCI Europe
- CCiVO
- CCP hf.
- CCS Global Tech
- CCS Infotech Ltd (CCSI)
- CD Key Generator
- CD Projekt
- CD-adapco
- CDBurnerXP
- CDC 160
- CDC 1604
- CDC 160A
- CDC 1700
- CDC 3100
- CDC 3200
- CDC 3300
- CDC 3500
- CDC 3600
- CDC 3800
- CDC 3800
- CDC 5100
- CDC 6400
- CDC 6500
- CDC 6600
- CDC 6700
- CDC 7600
- CDC 8600
- CDC 924
- CDC Advanced Flexible Processor
- CDC Kronos
- CDC Point SpA
- CDC SCOPE
- CDC Software
- CDC STAR-100
- CDEX Inc