Incompatible Timesharing System
The Incompatible Timesharing System (usually ITS) was an early time-sharing operating system; initially for the PDP-6, and later for PDP-10's. It was developed at MIT in the Artifical Intellegence Lab, after Multics was done by Project MAC.
It ran on KA10s which were modified with MIT-designed and built paging hardware (which that generation of PDP-10 did not have); it later ran on the KL10 and KS10 as well.
ITS was one of the first OS's connected to the ARPAnet, and it was on an ITS system that the first versions of Emacs and Zork were created.
During much of its lifetime, ITS was only running on a handful of machines:
- The AI Lab PDP-6 (the Dynamic Modeling group briefly had a PDP-6)
- Three KA10s: AI, DM, ML
- One KL10: MC
Due to failing hardware, the PDP-6 was shut down in the early 80s. The KA10s followed shortly after, but some were replaced with KS10s. By 1990 all MIT machines were shut down.
Some information on installing & images can be found here.
