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Mercury delay line tube, short
A short tube from a mercury delay line used on LEO I.
LEO I used delay line memory, a technology developed through radar research during WWII. Data would be continuously pulsed through these mercury-filled tubes until required by the machine. The length of the delay tube dictated the amount of information that could be stored - this tube was 17 bits. LEO I had a total of 2kB of memory.
This delay line tube is currently on display in the main gallery as part of our LEO exhibition for the National Lottery Heritage Funded-project 'Swiss Rolls, Tea and the Electronic Office'.
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This exhibit has a reference ID of CH54363. Please quote this reference ID in any communication with the Centre for Computing History.