HelenOS sources

SYSTEM_DEFAULT    312 uspace/app/shutdown-dlg/shutdown-dlg.c 	rc = system_open(SYSTEM_DEFAULT, &sd_system_cb, &sddlg, &sddlg.system);
SYSTEM_DEFAULT    183 uspace/app/shutdown/shutdown.c 	rc = system_open(SYSTEM_DEFAULT, &sd_system_cb, &shutdown, &system);
SYSTEM_DEFAULT    580 uspace/srv/system/system.c 	rc = loc_service_register(srv, SYSTEM_DEFAULT, &sid);