Ah, the fun 70's
I worked for a well known computer company as on-site tech support in a VERY well known airline main office. This office did all the ticket requests for the whole world (I think). The net was spread over 4 floors and was thicknet with delay boxes (If I ever get hold of the guy who designed it ....). Problem was if the connection went down, (TThere was 6 separate lines), and you had to start on the end of the dead loop. Each line went in and out over the floors in no particular order.
I lost weight (Thanks, I needed the help) in my first three months going floor to floor running up stairs, down corridors, completely around the floor to othet departments, etc.
After 3 months I had the new working, knew the layout better, and had everything in hand. Until they decided to mod tghe server beast. That's when I got out. I was to be on 24/7 call with no extra pay.
Miss those days. The big city I worked in had a lot of small stores in the area, and plenty of parts places.