Idris (operating system)

Idris is an operating system released by Whitesmiths, of Westford, Massachusetts.

Written by P. J. Plauger and M. S. Krieger of Whitesmiths, it was a real-time, UNIX-like, multi-user, multi-tasking operating system. It was originally written for the PDP-11 and later ported to run on a number of platforms including VAX, Motorola 68000 and Intel 8086.

In 1986, seeking business customers for the Atari ST, Atari hired Computer Tools International to port Idris to the Atari ST.