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    Information Research Services Updated: 18 August 1997
         
     
           
        Both the MicroPDP-11/93 and the PDP-11/94 offered a performance increase of up to 40% over the previous high-end PDP-11 systems. The new machines were the latest members of the longest-lived family of general-purpose computers. At this point, the series included over 20 members; more than 600,000 had been installed.