    SUN
    LINUX
    LINUX_ALPHA
    LINUX_PPC
    NETBSD
    FREEBSD
    FREEBSD_PPC
    SUN_SOLARIS
    I86_SOLARIS
    CONVEX
    HP
    ALPHA
    DEC5000
    RS6000
    SP1
    SP1_EUI
    SP1_EUIH
    IBM3090
    TITAN
    SGI
    SGI5
    SGI6
    SGI32
    SGIN32
    SGI_MP
    SGI_CH
    SGI_CH32
    SGI_CH64
    NEXT
    FX8
    FX2800
    FX2800_SWITCH
    PARAGON
    PARAGONIP
    IPSC860
    IPSC860_SOCKETS
    DELTA
    BALANCE
    SYMMETRY
    SYMMETRY_PTX
    MULTIMAX
    CRAY
    GP_1000
    TC_2000
    TC_2000_TCMP
    KSR
    CM5
    NCUBE
    MEIKO_CS2
    UXPM
    UXPV
