Model-View-Controller

    (MVC) A way of partitioning the design of
   interactive software; a software architecture pattern.  The
   "model" is the internal workings of the program (the data objects
   and algorithms), the "view" is how the user sees the state of
   the model and the "controller" is how the user changes the state
   or provides input.

   MVC was the original kind of what is now sometimes called an MV*
   pattern.  Trygve Reenskaug introduced it into Smalltalk-76 while
   visiting Xerox PARC in the 1970s.

   (2014-11-27)