ITS is a timesharing system created at MIT's Artificial Intelligence Laboratory in 1967 for their PDP-6 computer. It was soon moved to the newer PDP-10; for most of its life ITS ran on for of those machines. ITS is known for it's lack of security (no passwords, no file permissions) and it pioneered many famous programs.

The SDF ITS is at https://hactrn.org/ and is running on a KA10 emulator with an attached PDP-11 for serving Knight TV raster graphics terminals.

Some basic tutorials:

• HACTRN survival guide
• Adding a new ITS user

More information can be found by running INFO, and on GitHub.

Suggested topics to explore:

• Zork and Advent, classic text adventure games
• Maclisp, a major Lisp dialect
• Macsyma, symbolic math
• Logo, programming for kids
• C, pre-K&R version
• Muddle, the Dynamic Modeling programming language
• Maze, the 3D first person shooter (needs an Imlac emulator)