n. A user; esp. one who is also a loser.
(luser and loser are pronounced identically.) This word
was coined around 1975 at MIT. Under ITS, when you first walked up
to a terminal at MIT and typed Control-Z to get the computer's
attention, it printed out some status information, including how
many people were already using the computer; it might print
"14 users", for example. Someone thought it would be a great joke to
patch the system to print "14 losers" instead.
There ensued a great controversy, as some of the users didn't particularly want to
be called losers to their faces every time they used the computer.
For a while several hackers struggled covertly, each changing the
message behind the back of the others; any time you logged into the
computer it was even money whether it would say "users" or
"losers". Finally, someone tried the compromise "lusers", and it
stuck. Later one of the ITS machines supported 'luser' as a
request-for-help command. ITS died the death in mid-1990, except
as a museum piece; the usage lives on, however, and the term
'luser' is often seen in program comments.