chessie, that Cyber isn't exactly a PC. I used a CDC Cyber at UMass in the early 80s. We all remember the printout window. I think UMass developed the APL compiler for the Cyber. I used to use a program called SPICE for circuit analysis.
In grade school I also had access to a mainframe of some sort through those goofy modems we used to shove the phone handset into to get 30 baud or whatever it was. Some sort of yellow tape stored the programs.
We just ordered a bunch of rack mounted 16 processor Intel boxes with 192g of RAM. My SE had 20m of disk. For you whippersnappers, that's about 10,000 times more.
I can top (bottom?) that - I worked for IBM in the early 70's as a mainframe computer operator. It was what we called a Service Bureau - doing computing commercially because no-one could afford their own machines in those days.
The BIG machine of the three we ran was 512K We were all stoked when we got the first megabyte machine with virtual storage. I go all the way back to wiring up plug boards for card sorters - before the sorters were program controlled.
In those days a pocket calculator cost 2 weeks pay and could only perform the 4 basic arithmetic functions.
Now I have to get my granddaughter to help me program the cable box.
The worst part is, it doesn't seem all that long ago.
Just remember, youre not a geek unless you can remember toggling in a bootstrap program so the machine will read the paper tape tape so it will read the cards and finally access the 9 disk stack. Boy did it make a mess when you crashed heads on one of those drives.....
Did the toggling in the bootstrap program on a bunch of old Interdata computers. And if you exceeded the dimensions of the arrays in your program, you could be overwriting the OS.