Intel 80386SX

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

Intel 80386SX
386SX

   <processor> A lower-speed version of the {Intel 80386}.  It
   uses a 16-bit data bus instead of a 32-bit data bus.  It has a
   24-bit {address bus}.  It is faster than the 286, and more
   importantly, like the full-size 386, provides more flexibility
   in running existing DOS applications.  Intel's version runs at
   16 MHz, while {AMD}'s can run at up to 33 MHz.  It comes in a
   {PFP} package.

   (2003-07-05)