Nightmare File System
= N =
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. The historical
connection between early hackerdom and the ham radio world was
strong enough that this may have been an influence.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.