ZX81
Released in 1981, the Sinclair ZX81 is often seen as the machine that started the UK home computer boom.
Specifications
| Manufacturer | Sinclair |
| Processor | Z80 |
| Speed (MHz) | 1 |
| Ram (KB) | 1 |
| Ram expandable to (KB) | 16 |
| ROM (KB) | 8 |
| Sound | NONE |
| Keyboard type | Pressure sensitive |
| Number of keys | 40 |
| Dimensions (mm) | 175 x 168 x 43 |
| Weight (g) | 300 |
| Interfaces |
|