Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/src/cmd/plot
d-rwxrwxr-x glenda sys 0 Jul 15 2018 libplot --rw-rw-r-- glenda sys 277 Dec 12 1999 mkfile --rw-rw-r-- bootes sys 12237 Oct 16 2004 plot.c --rw-rw-r-- glenda sys 1002 Dec 12 1999 plot.h
