Freecom SILVER STORE 2-DRIVE NAS User Manual page 150

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 been simplified to
produce "uncompressed GIFs". This technique does not
use the LZW algorithm; the resulting GIF files are
larger than usual, but are readable by all standard GIF
decoders.
We are required to state that "The Graphics Interchange
Format(c) is the Copyright property of CompuServe
Incorporated. GIF(sm) is a Service Mark property of
CompuServe Incorporated."