Re: I hope someone brings out a book
Hamish Carmichael published two books in the 1990s containing stories from people who had worked for the many companies that had merged to form ICL. They used to be on the web too.
One story related to a punch card equipment factory in Letchworth during WW2.
One day the air raid alarm went off. The volunteer gun crew downed tools and rushed up to the roof with their machine gun. Just in time to see a low flying bomber disappearing into the distance.