EOF

EOF /E-O-F/ n.  [abbreviation, `End Of File']
   1. [techspeak] The {out-of-band} value returned by C's
   sequential character-input functions (and their equivalents in
   other environments) when end of file has been reached.  This value
   is -1 under C libraries postdating V6 UNIX, but was
   originally 0.  2. [UNIX] The keyboard character (usually control-D,
   the ASCII EOT (End Of Transmission) character) that is mapped by
   the terminal driver into an end-of-file condition.  3. Used by
   extension in non-computer contexts when a human is doing something
   that can be modeled as a sequential read and can't go further.
   "Yeah, I looked for a list of 360 mnemonics to post as a joke, but
   I hit EOF pretty fast; all the library had was a {JCL} manual."
   See also {EOL}.