Kernighan (the name is from their initials). It is characterized
by C-like syntax, a declaration-free approach to variable typing
and declarations, associative arrays, and field-oriented text
processing. See also {Perl}. 2. n. Editing term for an
expression awkward to manipulate through normal {regexp}
facilities (for example, one containing a {newline}). 3. vt. To
process data using `awk(1)'.

= B =
=====

:back door: n. A hole in the security of a system deliberately left
in place by designers or maintainers. The motivation for this is
not always sinister; some operating systems, for example, come out
of the box with privileged accounts intended for use by field
service technicians or the vendor's maintenance programmers.

Historically, back doors have often lurked in systems longer than
anyone expected or planned, and a few have become widely known.
The infamous {RTM} worm of late 1988, for example, used a back door
in the {BSD} UNIX `sendmail(8)' utility.

Ken Thompson's 1983 Turing Award lecture to the ACM revealed the
existence of a back door in early UNIX versions that may have
qualified as the most fiendishly clever security hack of all time.
The C compiler contained code that would recognize when the
`login' command was being recompiled and insert some code
recognizing a password chosen by Thompson, giving him entry to the
system whether or not an account had been created for him.