I start CAD CAM job in 1985 as a user and after as VAR.
My first software experience was RA3D on Mitra Mini-Computer coming directly from a Renault Drawing office.
After, it was on MicroCADDS and CADDS 4.x/5.x fromCOMPUTERVISION.
I start AutoCAD with the 9.x release (on SUN Microsystems WorkStations).
And Microstation (and Bentley others products) since the beginning of the V8 generation.