CNET Printer/Fax/Scanner/Copier appendix Tiff Software, 208

Appendix

The Unix configuration script "config- ure" was produced with GNU Auto- conf. It is copyright by the Free Software Foundation but is freely dis- tributable. The same holds for its sup- porting scripts (config. guess, config. sub, ltconfig, ltmain. sh). Another support script, install-sh, is copyright by M. I. T. but is also freely distribut- able.

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 ob- taining 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 implementa- tions will support it. ) So far as we are aware, there are no patent restrictions on the remaining code.

The IJG distribution formerly includ- ed 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 usu- al, but are readable by all standard GIF decoders.

11 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.

"

TIFF Software

Copyright (c) 1988-1997 Sam Leffler

Copyright (c) 1991-1997 Silicon Graphics, Inc.

Permission to use, copy, modify, dis- tribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that (i) the above copyright notices and this permission notice appear in all copies of the software and related documentation, and (ii) the names of Sam Leffler and Silicon Graphics may not be used in any advertising or pub- licity relating to the software without the specific, prior written permission of Sam Leffler and Silicon Graphics.

THE SOFTWARE IS PROVIDED "AS- IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABIL- ITY OR FITNESS FOR A PARTICU- LAR PURPOSE.

IN NO EVENT SHALL SAM LEF- FLER OR SILICON GRAPHICS BE LIABLE FOR ANY SPECIAL, INCI- DENTAL, INDIRECT OR CONSE- QUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHAT- SOEVER RESULTING FROM LOSS OF U SE, DA TA O R PROF ITS , WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABIL- ITY, ARISING OUT OF OR IN CON- NECTION WITH THE USE OR PERFORMANCE OF THIS SOFT- WARE.

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