JRE

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

Java Run-Time Environment
JRE

   <language> (JRE) The part of the {Java Development Kit}
   required to run Java programs.  The JRE consists of the {Java
   Virtual Machine}, the {Java} platform core {classes} and
   supporting files.  It does not include the compiler, debugger
   or other tools present in the JDK.  The JRE is the smallest
   set of executables and files that constitute the standard Java
   platform.

   (1998-11-30)