a report on software for the IMP. In 1968, Roberts awarded Kleinrock a contract to establish a Network Measurement Center (NMC) at UCLA to measure and model the performance of packet switching in the ARPANET.

Bolt Beranek & Newman (BBN) won the contract to build the network. Designed principally by Bob Kahn, it was the first wide-area packet-switched network with distributed control. The BBN "IMP Guys" independently developed