The Free On-line Dictionary of Computing (30 December 2018):

Dual In-Line Package
DIL

    (DIL, DIP) The most common type of package for
   small and medium scale integrated circuits, with up to about
   48 pins.  The pins hang vertically from the two long edges of
   the rectangular package, spaced at intervals of 0.1 inch.  The
   pins fit through holes in the circuit board to which they are
   soldered or into a socket.

   [More than 48 pins?]

   (1995-02-06)