[GH85Carrera]

Superior 400 gas station, Des Moines IA 1965








The Harwell CADET: World's First Fully Transistorized Computer.
Transistors began to appear in the early 1950's and the UK Atomic Energy Research Establishment (AERE) at Harwell's Electronics Division immediately began to take an interest in their possibilities. In 1953 Sir John Cockcroft encouraged them to design and build a computer using transistors throughout. E.H.Cooke-Yarborough based the design around a 64K magnetic drum memory with multiple moving heads, it had a clock speed of 58 kHz and used 324 point-contact transistors and 76 junction transistors. completed in 1955, CADET went into regular service in an experimental form in August 1956 and was built from a few standardized designs of circuit boards which never got mounted into the planned desktop unit, so it was left in its breadboard form. It operated in regular use for about 4 years. The CADET acronym means (Transistor Electronic Digital Automatic Computer - in reverse)