https://en.m.wikipedia.org/wiki/Cray-1
The idea of someone wheeling one of these into a cafe (because they are stealing the free wifi) causes me non zero amusement.
The NSA example from someone else is better.
Interestingly the only time I’ve ever had the pleasure of reclining on a Cray banquette was at the NSA’s cryptology museum at Ft Mead.