The first things that often come to mind is
I started shortly after screen & KB became the norm so we still had a class or two demonstrating older technologies. I feel that it is easier to translate, explain and get your ideas working with currently input/output.
On screen technology when I started I think we had 12" CRTs and I definitely remember 14" LCDs with ghosting and so on at the beginning. Even with ghosting though you almost instantly were able to code for 8 hours straight without eye strain. There was no way to do this with a CRT - even the very best and most expensive Sony ones :)
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