ACB     AM operand = VTAM
        APPLID field →     application program's symbolic name
        PASSWD field →     password
        EXLST field →      exit list
        MACRF field =      LOGON|NLOGON
        PARMS field =      (NIB subfield → NIB USERFLD
                           subfield = userdata)
        PARMS field =      (APPLVCTR → vector list address)
        PARMS=(KEEPFRR =   YES|NO)
        PARMS=(PERSIST =   YES|NO)
        PARMS=(FORCETKO =  YES|NO)
        PARMS=(SRBEXIT =   YES|NO)
        PARMS=(NQNAMES =   YES|NO)
        PARMS=(FDX =       YES|NO)
        PARMS=(PERFMON =   YES|NO)