Ah, that bought back memories...
Not least of working for a Televideo distributor in the '80s. One of their "terminals" was actually a PC, with an all-in-one motherboard in the bottom of the stand, which talked to the Televideo Novell Netware servers via RS-422 fast serial links. Quite advanced for the day.
Anyway, one of our customers was a company that maintained London black cabs, in an underground workshop somewhere on the outskirts of central London, I forget where exactly. They had something like 20 bays, and a constant stream of cabs coming and going.
I went up there one day to change out the BIOS ROM chips on their half-dozen PC. The outsides of the systems were reasonably clean, by the standards of other workshop PCs I have known. But, oh my, the state of the motherboards...
GJC