Information Research Services Updated: 27 January 1998
        VMS V5.5 supported the MicroVAX 3100, VAX and VAXserver 6000-6xx series, VAX 4000 and VAXstation 4000 (shown at left). V5.5 features included new queue manager, new licensing features, LAT enhancements, host based shadowing, cluster wide tape service (TMSCP), and new RTLs (DECthreads and BLAS fast-vector maths library).