lookup_system_book 4004 src/dps8/dps8_sys.c     {"LOOKUP_SYSTEM_BOOK", lookup_system_book,    0, "Lookup an address or symbol in the Multics system book\n", NULL, NULL},
lookup_system_book 4005 src/dps8/dps8_sys.c     {"LSB",                lookup_system_book,    0, "Lookup an address or symbol in the Multics system book\n", NULL, NULL},