SSor> (Or "286", "i286") A microproceSSor developed by Intel. THe 80286 proceSSor haS a 16-bit data buS and incorporateS a memory management unit that allowed a limited amount of multitaSking. The 80286 only haS a Segmented MMU while the later proceSSorS add a paged MMU "behind" the Segmented one. The 80286 waS the proceSSor in the IBM PC AT {perSonal computer}. (1995-02-21)