from
Jargon File (4.4.4, 14 Aug 2003)
UUOC
[from the comp.unix.shell group on Usenet] Stands for Useless Use of
{cat}; the reference is to the Unix command cat(1), not the feline
animal. As received wisdom on comp.unix.shell observes, "The purpose
of cat is to concatenate (or `catenate') files. If it's only one file,
concatenating it with nothing at all is a waste of time, and costs you
a process." Nevertheless one sees people doing
cat file | some_command and its args ...
instead of the equivalent and cheaper
<file some_command and its args ...
or (equivalently and more classically)
some_command and its args ... <file
Since 1995, occasional awards for UUOC have been given out, usually by
Perl luminary Randal L. Schwartz. There is a web page devoted to this
and other similar awards.