I will be putting up my pictures of ICT 1301 computers, which are very interesting because:

° They were one of the 'Germanium Giants'.

° They weighed about 5 1/2 tons.

° They took up 500-700 square feet of floor space.

° The used 13kVA of three phase electical power.

° They were second generation computers, so mainly discrete transistors rather than the thermionic valves of the first generation or the integrated circuits of the third generation and onward.

° They were introduced in 1962

° They were made by ICT (International Computers and Tabulators), formerly BTM (British Tabulating Machine Co) who made the production models of the machines which broke the German Enigma code at Bletchley Park, shortening World War 2 by two years.

The photos were mostly taken during the approximately 35 years that I owned one of these remarkable machines before I donated it to TNMoC (The National Museum of Computing) at Bletchley Park. It was called 'Flossie' and bore the serial number 6.

There are also picture of a second ICT1301 I also owned for about 25 years which was called 'Arthur' and it was serial number 75.

Probably over 200 of these machines were made and for a while about a quarter of all the computers in Britain were ICT 1301s.