@kenshirriff Funnily British Telecom (now BT) as it was called also used 8088 and 8086 as the CPU at the core of their System-X telephone system that replaced their old Strowger (SXS) switching system and telephone exchange gear.

Back in the day, BT Engineering and R&D types had a public Engineering publication that in a multi-issue series the entire design to a circuit level for System-X, plus the x86 ASM source for the OS was published. The OS even had a version vuln to the old 8088 INT bug.