evansAndSutherland :: esv :: 517933-100AA ESV Workstation ES PEX Jun1990
A 1990 Evans & Sutherland technical manual for the ESV workstation's PEX and PHIGS graphics software, written for programmers using X Window System hardware. The plates are flat block diagrams: stacked grey-screened bands labelled Application, Xlib, PHIGS, X Server and Device Control, joined by plain arrows and a lightning-bolt line marking the X Protocol.


