unknown; Bostic, Keith (October 21, 1988). "File usr.bin/w/Makefile artifact". University of California, Berkeley Computer Systems Research Group. Retrieved November 22, 2022. ln ${DESTDIR}/usr/ucb/w ${DESTDIR}/usr/ucb/uptime
unknown; Joy, Bill (October 21, 1988). "File usr.bin/w/w.c artifac". University of California, Berkeley Computer Systems Research Group. Retrieved November 22, 2022. This program is similar to the systat command on Tenex/Tops 10/20