LEO II main console display tube

Prev
Next
Image Zoom
  • Details
  • Description
Photographer
Richards, Mark
Dimensions
overall: 6 in x 6 in x 18 in
Manufacturer
LEO Computers Ltd.
Credit Line
Purchase of the Computer History Museum
Copyright Owner
© Mark Richards
Object ID
102716094
Speed
340µs/add
Memory Type
Mercury delay line
Memory Size
1024 words
Memory Width
39-bit
Cost
$250,000 (£90,000/1958)

Operators used these displays to monitor the computer’s operation. This tube is from the third LEO II built (one of the first installed outside of Lyons). The computer was used by prominent British steelmaker Stewart & Lloyds for payroll processing.