CAD on VAX-11/750 at Trent Poly in 1986
DOGS (Design Office Graphics System) from PAFEC.
I oversaw commissioning of the system circa 1983; previously Trent ran a similar system on a PDP-11/40 under RSM-11M.
Personally had moved on from Trent Poly by 1986 to ICI who ran multiple PDP-10s, mainly under TOPS-20 as DECSYSTEM-20s.