Casio V-N500 Series User Manual page 239

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 fi le 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 fi les "pngbar.png" and
"pngbar.jpg (88x31) and "pngnow.png" (98x31).
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
certifi cation mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
May 15, 2007
E-237