On Jan 27, 2023, at 1:19 AM, Paul Ruizendaal <pnr@planet.nl> wrote:
The version of X discussed in the paper was apparently part of the 4.3BSD distribution tapes:
"The use of X has grown far beyond anything we had imagined. Digital has incorporated X into a commercial product, and other manufacturers are following suit. With the appearance of such products and the release of complete X sources on the Berkeley 4.3 UNIX distribution tapes, it is no longer feasible to track all X use and development.”