osx man page for pnm

pnm(5)                                                          File Formats Manual                                                         pnm(5)

NAME
       pnm - portable anymap file format

DESCRIPTION
       The  pnm  programs operate on portable bitmaps, graymaps, and pixmaps, produced by the pbm, pgm, and ppm segments.  There is no file format
       associated with pnm itself.

SEE ALSO
       anytopnm(1), rasttopnm(1), tifftopnm(1), xwdtopnm(1), pnmtops(1), pnmtorast(1), pnmtotiff(1), pnmtoxwd(1), pnmarith(1), pnmcat(1),  pnmcon-
       vol(1),  pnmcrop(1),  pnmcut(1),  pnmdepth(1), pnmenlarge(1), pnmfile(1), pnmflip(1), pnmgamma(1), pnmindex(1), pnminvert(1), pnmmargin(1),
       pnmnoraw(1), pnmpaste(1), pnmrotate(1), pnmscale(1), pnmshear(1), pnmsmooth(1), pnmtile(1), ppm(5), pgm(5), pbm(5)

AUTHOR
       Copyright (C) 1989, 1991 by Jef Poskanzer.

                                                                 27 September 1991                                                          pnm(5)