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When was the first Colossus computer installed at Bletchley Park?
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Ultra
The British government established a code-breaking effort, known as Ultra, at Bletchley Park in Buckinghamshire, England, during World War II.
The first Colossus computer, also known as the Mark I, was delivered to the code-breaking operation at Bletchley Park in January 1944. While some records note its construction was completed and it was dispatched in December 1943, it arrived at the facility via a Post Office motortruck in January 1944, marking a pivotal moment in the history of computing.12