usage: /usr/bin/pic [-CnSU] [file ...]
usage: /usr/bin/pic -t [-cCSUz] [file ...]
usage: /usr/bin/pic {-v | --version}
usage: /usr/bin/pic --help

GNU pic is a troff(1) preprocessor that translates descriptions of
diagrammatic pictures embedded in roff(7) or TeX input into the language
understood by TeX or troff.  See the pic(1) manual page.