tool

tool 1. n.  A program used primarily to create, manipulate,
   modify, or analyze other programs, such as a compiler or an editor
   or a cross-referencing program.  Oppose {app}, {operating
   system}.  2. [UNIX] An application program with a simple,
   `transparent' (typically text-stream) interface designed
   specifically to be used in programmed combination with other tools
   (see {filter}, {plumbing}).  3. [MIT: general to students
   there] vi. To work; to study (connotes tedium).  The TMRC
   Dictionary defined this as "to set one's brain to the
   grindstone".  See {hack}.  4. n. [MIT] A student who studies
   too much and hacks too little.  (MIT's student humor magazine
   rejoices in the name "Tool and Die".)