> C fans tend to regard BCPL as an unimportant transitional step, but it was used in two celebrated OSes. One was the TRIPOS operating system, later used as the

> C fans tend to regard BCPL as an unimportant transitional step, but it was used in two celebrated OSes. One was the TRIPOS operating system, later used as the original basis of AmigaOS. The latter is a bit of an exaggeration. Tripos related code written in BCPL was used for "AmigaDOS" - meaning the filesystem driver, the command line shell, a few bits of process control, and a variety of generic command line utilities. It was not used for the kernel (Exec), or graphics support, or the gui library (Intuition), or the graphical shell (Workbench), or lower level device drivers, which were all written in C or 68K assembly. The Tripos derived parts were nice though, generally nicer than the MSDOS equivalent and somewhat friendlier than the Unix command line, if the filesystem was a little slow, comparatively speaking.