Note that a lot of the "shell"/AmigaDOS details were inherited from Tripos[1], along with BCPL to implement that (the BCPL that begat first B and then C at Bell

Note that a lot of the "shell"/AmigaDOS details were inherited from Tripos[1], along with BCPL to implement that (the BCPL that begat first B and then C at Bell Labs). IIRC, that was a temporary solution until they got their own design running, but as usual, nothing lasts longer than a stopgap. [1]: https://en.wikipedia.org/wiki/TRIPOS https://en.wikipedia.org/wiki/TRIPOS