Plan 9 from Bell Labs’s /n/sources/plan9/sys/src/cmd/plot
d-rwxrwxr-x glenda sys 0 Sep 19 2013 libplot --rw-rw-r-- glenda sys 277 Dec 11 1999 mkfile --rw-rw-r-- glenda sys 12237 Oct 16 2004 plot.c --rw-rw-r-- glenda sys 1002 Dec 11 1999 plot.h