Epson PowerLite 1830W Guide De L'utilisateur page 207

These conditions apply to any software derived from or based on the
IJG code, not just to the unmodified library. If you use our work, you
ought to acknowledge us.
Permission is NOT granted for the use of any IJG author's name or
company name in advertising or publicity relating to this software or
products derived from it. This software may be referred to only as "the
Independent JPEG Group's software".
We specifically permit and encourage the use of this software as the
basis of commercial products, provided that all warranty or liability
claims are assumed by the product vendor.
ansi2knr.c is included in this distribution by permission of L. Peter
Deutsch, sole proprietor of its copyright holder, Aladdin Enterprises
of Menlo Park, CA. ansi2knr.c is NOT covered by the above
copyright and conditions, but instead by the usual distribution terms
of the Free Software Foundation; principally, that you must include
source code if you redistribute it. (See the file ansi2knr.c for full
details.) However, since ansi2knr. c is not needed as part of any
program generated from the IJG code, this does not limit you more
than the foregoing paragraphs do.
The Unix configuration script "configure" was produced with GNU
Autoconf. It is copyright by the Free Software Foundation but is freely
distributable. The same holds for its supporting scripts (config.guess,
config.sub, ltconfig, ltmain.sh). Another support script, install-sh, is
copyright by M.I.T. but is also freely distributable.
It appears that the arithmetic coding option of the JPEG spec is
covered by patents owned by IBM, AT&T, and Mitsubishi. Hence
arithmetic coding cannot legally be used without obtaining one or
more licenses. For this reason, support for arithmetic coding has been
removed from the free JPEG software. (Since arithmetic coding
provides only a marginal gain over the unpatented Huffman mode, it
is unlikely that very many implementations will support it.) So far as
we are aware, there are no patent restrictions on the remaining code.
The IJG distribution formerly included code to read and write GIF
files. To avoid entanglement with the Unisys LZW patent, GIF
reading support has been removed altogether, and the GIF writer has
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