Epson PowerLite 1830W Guide De L'utilisateur page 211

The Contributing Authors and Group 42, Inc. specifically permit,
without fee, and encourage the use of this source code as a component
to supporting the PNG file format in commercial products. If you use
this source code in a product, acknowledgment is not required but
would be appreciated.
A "png_get_copyright" function is available, for convenient use in
"about" boxes and the like:
printf("%s",png_get_copyright(NULL));
Also, the PNG logo (in PNG format, of course) is supplied in the files
"pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
Libpng is OSI Certified Open Source Software. OSI Certified Open
Source is a certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp@users.sourceforge.net
September 12, 2004
zlib
This projector product includes the open source software program
"zlib" which applies the terms and conditions provided by owner of
the copyright to the "zlib".
The "zlib" are WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
List of zlib programs
zlib-1.1.4
License terms of conditions of each program which are provided by
owner of the copyright to the "zlib" are as follows.
Copyright notice:
(C) 1995-1998 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Avis
211