My engineering school switched from mainframe to PCs for my Freshman year, but at that point it was via a couple PC labs as they did not require students to own PCs until the class that started the following year. It was typical to only get a timeslot for a PC after 10 pm at night. You had to 'check out' the 5-1/2 inch floppies containing the programs at the front desk, and bring your own floppy to store your data/ results. Senior year I worked on a project for a research professor that required using a structural analysis program that was only available on the mainframe. The professor had to hire a computer science major to make all the punch cards for the hundreds of calculations I needed run. These days I could probably handle the whole thing on a phone app in about 10 minutes.
When I interned the summer before my senior year, the engineering company had just acquired two PCs set up with AutoCad. Version/ Release 2.0. The PCs needed special RAM added (1 MB!!!!), math co-processor chips and 20 MB hard drives. Each setup was over $5k USD in 1986. And watching the pen plotter do it's thing was always a site to behold. Especially when a pen would dry up or skip 15 minutes into a plot that took 20 minutes.
Good times.
😁