We used Microstation which is better than Autocad. But most of my work was with structural analysis programs and anlysing the forces of ocean waves on fixed and floating drilling platforms. Stuff that was not possible before we had computers. At first we had to take our problems to a main frame computer to be run and then personal computers came out and then we got computers on our desks.
My friend was trained back in the 80s on Computervision but when he joined our company we had not gone over to CAD then so he got left behind on CAD.