zx-81

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

ZX-81

   <computer> An even more successful version of the {Sinclair}
   {ZX-80}, featuring a large {uncommitted logic array} instead
   of much discrete logic, an improved {BASIC}, and rather more
   expandability (it could take 16kb {RAM} packs).  It was
   launched around 1981 and was eventually replaced by the
   {Spectrum}.

   (1995-11-04)