IBM PCjr

from The Free On-line Dictionary of Computing (8 July 2008)

IBM PCjr
PCjr

   <computer> ({IBM PC} Junior) A {floppy disk}-based home
   computer with an {Intel 8088} {CPU} and a {chiclet keyboard},
   released in November 1983.  The PCjr could be expanded to have
   two floppy drives and 640 kilobytes of {RAM} using {sidecars}.
   Some even had a {mouse} and could run drawing programs with
   {popup menus}.

   (1995-10-06)