ibm pc xt

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

IBM PC XT
XT

   <computer> An {IBM PC} with a (slow) {hard disk}.  The XT was
   released in March 1983.  It had an {Intel 8088} {CPU}.  The
   XT/370, released in October 1983, added {IBM 370} {mainframe}
   {emulation}, and the XT 286 followed in September 1986 with an
   {Intel 80286} CPU [Why?].

   (1996-05-21)