T

T /T/  1. [from LISP terminology for `true'] Yes.  Used
   in reply to a question (particularly one asked using {The `-P'
   convention}).  In LISP, the constant T means `true', among other
   things.  Some hackers use `T' and `NIL' instead of `Yes' and `No'
   almost reflexively.  This sometimes causes misunderstandings.  When
   a waiter or flight attendant asks whether a hacker wants coffee, he
   may well respond `T', meaning that he wants coffee; but of course
   he will be brought a cup of tea instead.  As it happens, most
   hackers (particularly those who frequent Chinese restaurants) like
   tea at least as well as coffee -- so it is not that big a problem.
   2. See {time T} (also {since time T equals minus infinity}).
   3. [techspeak] In transaction-processing circles, an abbreviation
   for the noun `transaction'.  4. [Purdue] Alternate spelling of
   {tee}.  5. A dialect of {LISP} developed at Yale.