8' raised floors
Ah, those were the days. Remember the days of FEPs and 50ft 25-pin RS-232 cables? Some, we replaced with 4-wire, and others, with 6-way (dcd) and 12-way 'octopus' cables using 50-pin telco cables. I think we recycled over 700 of the RS-232 cables after replacing everything, and when we did, the floor tiles were no longer floating on the cables.
Cheers for the fond, and not-so-fond memories.