Interface Message Processors for the ARPA Computer Network
A 1973 technical report from Bolt Beranek and Newman in Cambridge, Massachusetts, prepared for the Defense Technical Information Center, on interface message processors for the ARPA computer network. The first picture is a schematic of a host linked to a satellite across distances in miles, and the second is a pair of throughput line graphs in kilobits per second for 516 and 316 IMP units, showing rising curves with stepped segments that suggest a clean diagram style for technical data.
