The Interface Message Processor Program
A 1977 technical report on the Interface Message Processor program, a computer networking document produced by Bolt Beranek and Newman in Cambridge, Massachusetts, and circulated through the Defense Technical Information Center for network engineers. Its pictures are plain line diagrams, rotated pages and flowcharts of packet flow, message protocol, interrupt structure and a small network map, which a designer could borrow as schematic motifs for connected systems, routing and node-based layouts.
