This program is part of Netpbm(1).
pnmnoraw was replaced in Netpbm 8.2 (March 2000) by pnmtoplainpnm(1), which was obsoleted by pnmtopnm in Netpbm 10.23 (July 2004), which in turn was obsoleted by pamtopnm.
pnmtoplainpnm was actually the same program; it was just renamed to make it clear that is just a format converter.
pamtopnm is more general, in that it can go both directions. pamtopnm -plain is the same as pnmnoraw.
This manual page was generated by the Netpbm tool 'makeman' from HTML source. The master documentation is at