| 23669 | Heat Losses | ZX-Spectrum 48K | English |
| 23943 | Labour Rate Calculating | ZX-Spectrum 48K | English |
| 23940 | Lighting Calculations | ZX-Spectrum 48K | English |
| 30637 | Nuclear Reactions | ZX-Spectrum 16K | English |
| 39539 | Orba | ZX-Spectrum 48K | Czech |
| 12005 | Plumber's Price | ZX-Spectrum 48K | English |
| 23743 | Pricing Building Works | ZX-Spectrum 48K | English |
| 18894 | SteelCalc | ZX-Spectrum 48K | English |
| 26232 | Student Lighting Calculations | ZX-Spectrum 48K | English |
| 26233 | Student Volt Drop | ZX-Spectrum 48K | English |
| 43242 | Test částí stejnosměrného motoru | ZX-Spectrum 48K | Czech |
| 18895 | TimberCalc | ZX-Spectrum 48K | English |
| 23929 | Triple Program | ZX-Spectrum 48K | English |
| 23944 | Trunking Size Calculating | ZX-Spectrum 48K | English |
| 18891 | Truss | ZX-Spectrum 48K | English |
| 23945 | Volt Drop | ZX-Spectrum 48K | English |
| 38362 | Výpočet namáhání nosníku | ZX-Spectrum 48K | Czech |