Related:

• NIL /nil/ No. Used in reply to a question, particularly one asked using the `-P' convention.
  Most hackers assume this derives simply from LISP terminology for `false' (see also T), but NIL as a negative reply was well-established among radio hams decades before the advent of LISP....
• T /T/ 1. [from LISP terminology for `true'] Yes.
  Used in reply to a question (particularly one asked using The -P convention)....
• T: /T/ 1. [from LISP terminology for `true'] Yes. Used in reply to a question (particularly one asked using {The `-P' convention}).
  In LISP, the constant T means `true', among other things....
• The `-P' convention: --------------------- Turning a word into a question by appending the syllable `P'
  from the LISP convention of appending the letter `P' to denote a predicate (a boolean-valued function)....
• alk mode n. A feature supported by Unix, ITS, and some other OSes that allows two or more logged-in users to set up a real-time on-line conversation.
  It combines the immediacy of talking with all the precision (and verbosity) that written language entails....
• Read my Lisp...no new syntax. (nil)
• bug n. An unwanted and unintended property of a program or piece of hardware, esp.
  one that causes it to malfunction. Antonym of feature....
• TECO /tee'koh/ n.,v. obs. 1. [originally an acronym for `[paper] Tape Editor and COrrector'
  later, `Text Editor and COrrector'] n. A text editor developed at MIT and modified by just about everybody....
• ITS /I-T-S/ n. 1. Incompatible Time-sharing System, an influential though highly idiosyncratic operating system written for PDP-6s and PDP-10s at MIT and long used at the MIT AI Lab.
  Much AI-hacker jargon derives from ITS folklore, and to have been `an ITS hacker' qualifies one instantly as an old-timer of the most venerable sort....