"Some Honeywell machines, for example, had nine-bit bytes."

OS 2200 has 36-bit words. It is still a supported platform.

https://en.wikipedia.org/wiki/UNIVAC_1100/2200_series

This platform was the first SMP UNIX implementation:

"Any configuration supplied by Sperry, including multiprocessor ones, can run the UNIX system."

https://www.nokia.com/bell-labs/about/dennis-m-ritchie/other...