All caps typography was common on teletype machines, such as used by police departments, news, and the then-called Weather Bureau, as well as early computers, such as certain early Apple II models and the ZX81, which had a limited support for lower-case text.
Four computer models for the ZX81 micro-computer, C.G. Windsor, 1983, ISBN 978-0-9509197-0-6
During the 1980s, they developed games for various systems (Oric 1, ZX81, ZX Spectrum, Thomson and the Atari ST).
ZX81 |
The industrial design was done by Rick Dickinson, who already designed the ZX81 and ZX Spectrum range of products.