| 37979 | Business Programs | ZX81 1K | English |
| 36613 | Caixa | ZX81 16K | Portuguese |
| 37505 | Calc | ZX-Spectrum 48K | Spanish |
| 25712 | Calculating VAT | ZX-Spectrum 16K | English |
| 19662 | Cash Basis Accounts | ZX-Spectrum 48K | English |
| 14013 | Cash Book | ZX-Spectrum 48K | English |
| 11556 | Cash Book | ZX-Spectrum 48K | English |
| 8003 | Cash Book Accounting | ZX-Spectrum 48K | English |
| 39200 | Cash Trader | Sinclair QL | English |
| 11575 | Charge Master | ZX-Spectrum 48K | English |
| 42108 | Cinematica | ZX-Spectrum 48K | Portuguese |
| 11587 | Classic Bookkeeping | ZX-Spectrum 48K | English |
| 39676 | Coefficient of Rank Correlation | ZX-Spectrum 16K | English |
| 43802 | Coin Analysis | ZX-Spectrum 16K/48K | English |
| 8136 | Commercial Accounts Program | ZX-Spectrum 48K | - |
| 20002 | Computer Aided Design | ZX-Spectrum 48K | English |
| 19962 | Computerised News System | ZX-Spectrum 48K | English |
| 42110 | Contabilidade | ZX-Spectrum 48K | Portuguese |
| 20718 | Control Stock | ZX-Spectrum 48K | Spanish |
| 15017 | Control de Stock | ZX-Spectrum 48K | Spanish |