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A list of major ITS attractions.

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Lars Brinkhoff
2023-03-11 11:17:00 +01:00
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# ITS Attractions
**Maclisp** — historical Lisp for ITS and Multics, and the base
for a family of dialects that consolidated as the Common Lisp standard.
It was used to bootstrap **Scheme**.
**SHRDLU** — infamous natural language input and block stacking
robot simulation, written in Maclisp.
**Lisp machines** — were bootstrapped from ITS and Maclisp.
**C compiler** — written by Alan Snyder; possibly the first
created outside Bell Labs.
**Macsyma** — symbolic manipulation program that was written in
Maclisp and made available to researchers on the Arpanet. Macsyma was
so important a dedicated PDP-10 was purchased for it, not just once,
but twice.
**Emacs** — was developed on ITS as a set of **TECO** macros.
**The Magic Switch** — a piece of hacker lore chronicled in Guy
Steele's book *Hacker's Dictionary*. The book comes from the
**JARGON** file.
**Logo** — educational programming language began at BBN but
greatly enhanced at MIT. ITS hosts many versions for the PDP-10,
PDP-11, Apple II, etc. A **Small ITS** timesharing system was written
to run Logo on a PDP-11/45. Marvin Minsky designed the **2500**, a
dual text and vector display minicomputer for running Logo.
**CLU** — a programming language by Barbara Liskov that
introduced abstract data types way ahead of its times. The CLU group
developed the first version of the X Window System.
**Zork** — was written in **MDL**/**Muddle**, the major
programming language on the Dynamic Modeling PDP-10. Zork was
inspired by (**Colossal Cave**) **Advent**ure, which is also available
on ITS. Together, the two games were instrumental in kicking off text
adventure games and interactive fiction.
**Maze** — 3D game, and possibly the first first-person shooter.
**MacHack VI** — Greenblatt's chess program was the first
computer program to play chess in human tournament competitions and be
granted a chess rating.
**Spacewar** — one of the first video games. First developed on
a PDP-1 at MIT. ITS has a much updated PDP-6 version, and consoles
made by **HAKMEM** author Mike Beeler.