CHM Revolution

Photographer

Richards, Mark

Dimensions

overall: 1 3/4 in x 4 3/4 in x 2 3/4 in

Manufacturer

National Physical Laboratory

Credit Line

Loan courtesy of the National Computing Museum, UK

Copyright Owner

© Mark Richards

Object ID

500002029

These handmade “buttons and lights” switch boxes connected terminals to the NPL network developed by packet-switching pioneer Donald Davies. NPL was a competitor to ARPANET.