Netpbm consists of code contributed by many authors. In every file of
the source code, there is a copyright notice, telling you what you may
or may not do with the code. All authors have granted you the right to
use and distribute their code without having to pay them, as long as
you meet some simple requirements.

Most of the components require you to include a copy their copyright
notices and warranty disclaimers in any copies or derivations you
distribute.

Another restriction that some of the software has is that in order to
have permission to copy it (which includes writing anything derived
from it), you must distribute source code for your copy or derivation
and propagate the same restriction to people who would copy your
derivation.  In other words, the price the author wants for the use of
his proprietary work is your contribution to the free software cause.

One component prohibits you from selling it or using it in a
commercial way: hpcdtoppm.

Some components are contributed to the public domain.  

The copyrights on individual components of this package are detailed 
at appropriate places within the package.


