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60497 Hollerith Punched Card Reader
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Description of Photograph Photograph of the British Tabulating Machines (BTM) Hollerith Punched Card Reader, part of the LEO I installation at Cadby Hall (the same machine was later used on LEO II). Evidently the image was taken at an early stage, as the card machines were finally situated in front of the power supply units in what became the peripherals area.
According to Peter Bird's caption on the reverse of the print, the Card Reader was capable of processing 200 cards per minute. This image appears in the interactive plan for our Virtual LEO I installation, p33.
Provenance Date: c1953 Physical Description: 1 photographic print; black and white Archives Hub References: CMLEO/PB/PH/1/60497 PJB/3/2/35A Other References: DCMLEO20190510028 Comment on This Photograph This exhibit has a reference ID of CH60497. Please quote this reference ID in any communication with the Centre for Computing History. 
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