Interface Message Processor (IMP)


Computer History Museum

Computer History Museum
Mountain View, United States

This large box was the interface between the ARPANET (a predecessor to the Internet) and a computer connected to the network. This $82,200 IMP was one of the first made. The Honeywell 516 minicomputer inside has only 12,000 words of memory.


  • Title: Interface Message Processor (IMP)
  • Date: 1965
  • Rights: © Mark Richards

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