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   9 <H1 CLASS="title">Software License Agreement</H1>
  10
  11 <P ALIGN="CENTER">Copyright 2007-2013 by Apple Inc.<BR>
  12 1 Infinite Loop<BR>
  13 Cupertino, CA 95014 USA<BR>
  14 <BR>
  15 WWW: <A HREF="http://www.cups.org/">http://www.cups.org/</A>
  16
  17 <H2 CLASS="title"><A NAME="INTRO">Introduction</A></H2>
  18
  19 <P>CUPS<SUP>TM</SUP> is provided under the GNU General Public License ("GPL") and GNU Library General Public License ("LGPL"), Version 2, with an exception for Apple operating systems. A copy of the exception and licenses follow this introduction.</P>
  20
  21 <P>The GNU LGPL applies to the CUPS and CUPS Imaging libraries located in the
  22 "cups" and "filter" subdirectories of the CUPS source distribution and the files
  23 in the "test" subdirectory. The GNU GPL applies to the remainder of the CUPS
  24 distribution.</P>
  25
  26 <P>For those not familiar with the GNU GPL, the license basically
  27 allows you to:</P>
  28
  29 <UL>
  30
  31         <LI>Use the CUPS software at no charge.</LI>
  32
  33         <LI>Distribute verbatim copies of the software in source
  34         or binary form.</LI>
  35
  36         <LI>Sell verbatim copies of the software for a media
  37         fee, or sell support for the software.</LI>
  38
  39 </UL>
  40
  41 <P>What this license <EM>does not</EM> allow you to do is make
  42 changes or add features to CUPS and then sell a binary
  43 distribution without source code. You must provide source for any
  44 changes or additions to the software, and all code must be
  45 provided under the GPL or LGPL as appropriate. The only
  46 exceptions to this are the portions of the CUPS software covered
  47 by the Apple operating system license exceptions outlined later
  48 in this license agreement.</P>
  49
  50 <P>The GNU LGPL relaxes the "link-to" restriction, allowing you
  51 to develop applications that use the CUPS and CUPS Imaging
  52 libraries under other licenses and/or conditions as appropriate
  53 for your application, driver, or filter.</P>
  54
  55
  56 <H2 CLASS="title"><A NAME="EXCEPTIONS">License Exceptions</A></H2>
  57
  58 <P>In addition, as the copyright holder of CUPS, Apple Inc. grants
  59 the following special exception:</P>
  60
  61 <OL>
  62
  63         <LI><B>Apple Operating System Development License
  64         Exception</B>;
  65
  66         <OL TYPE="a">
  67
  68                 <LI>Software that is developed by any person or
  69                 entity for an Apple Operating System ("Apple
  70                 OS-Developed Software"), including but not
  71                 limited to Apple and third party printer
  72                 drivers, filters, and backends for an Apple
  73                 Operating System, that is linked to the CUPS
  74                 imaging library or based on any sample filters
  75                 or backends provided with CUPS shall not be
  76                 considered to be a derivative work or collective
  77                 work based on the CUPS program and is exempt
  78                 from the mandatory source code release clauses
  79                 of the GNU GPL. You may therefore distribute
  80                 linked combinations of the CUPS imaging library
  81                 with Apple OS-Developed Software without
  82                 releasing the source code of the Apple
  83                 OS-Developed Software. You may also use sample
  84                 filters and backends provided with CUPS to
  85                 develop Apple OS-Developed Software without
  86                 releasing the source code of the Apple
  87                 OS-Developed Software.</LI>
  88
  89                 <LI>An Apple Operating System means any
  90                 operating system software developed and/or
  91                 marketed by Apple Inc., including but not limited
  92                 to all existing releases and versions of Apple's
  93                 Darwin, macOS, and macOS Server products and all
  94                 follow-on releases and future versions thereof.</LI>
  95
  96                 <LI>This exception is only available for Apple
  97                 OS-Developed Software and does not apply to
  98                 software that is distributed for use on other
  99                 operating systems.</LI>
 100
 101                 <LI>All CUPS software that falls under this
 102                 license exception have the following text at the
 103                 top of each source file:
 104
 105                 <BLOCKQUOTE>This file is subject to the Apple
 106                 OS-Developed Software
 107                 exception.</BLOCKQUOTE></LI>
 108
 109         </OL>
 110
 111 </OL>
 112
 113 <P>No developer is required to provide this exception in a derived work.</P>
 114
 115
 116 <H2 CLASS="title"><A NAME="KERBEROS">Kerberos Support Code</A></H2>
 117
 118 <P>The Kerberos support code ("KSC") is copyright 2006 by Jelmer
 119 Vernooij and is provided 'as-is', without any express or implied
 120 warranty. In no event will the author or Apple Inc. be held liable
 121 for any damages arising from the use of the KSC.</P>
 122
 123 <P>Sources files containing KSC have the following text at the top
 124 of each source file:</P>
 125
 126 <BLOCKQUOTE>This file contains Kerberos support code, copyright
 127 2006 by Jelmer Vernooij.</BLOCKQUOTE>
 128
 129 <P>The KSC copyright and license apply <EM>only</EM> to
 130 Kerberos-related feature code in CUPS. Such code is typically
 131 conditionally compiled based on the present of the
 132 <TT>HAVE_GSSAPI</TT> preprocessor definition.</P>
 133
 134 <P>Permission is granted to anyone to use the KSC for any
 135 purpose, including commercial applications, and to alter it and
 136 redistribute it freely, subject to the following
 137 restrictions:</P>
 138
 139 <OL>
 140
 141         <LI>The origin of the KSC must not be misrepresented; you
 142         must not claim that you wrote the original software. If
 143         you use the KSC in a product, an acknowledgment in the
 144         product documentation would be appreciated but is not
 145         required.</LI>
 146
 147         <LI>Altered source versions must be plainly marked as
 148         such, and must not be misrepresented as being the
 149         original software.</LI>
 150
 151         <LI>This notice may not be removed or altered from any
 152         source distribution.</LI>
 153
 154 </OL>
 155
 156
 157 <H2 CLASS="title"><A NAME="TRADEMARKS">Trademarks</A></H2>
 158
 159 <P>CUPS and the CUPS logo (the "CUPS Marks") are trademarks of Apple Inc. Apple
 160 grants you a non-exclusive and non-transferable right to use the CUPS Marks in
 161 any direct port or binary distribution incorporating CUPS software and in any
 162 promotional material therefor. You agree that your products will meet the
 163 highest levels of quality and integrity for similar goods, not be unlawful, and
 164 be developed, manufactured, and distributed in compliance with this license.
 165 You will not interfere with Apple's rights in the CUPS Marks, and all use of the
 166 CUPS Marks shall inure to the benefit of Apple. This license does not apply to
 167 use of the CUPS Marks in a derivative products, which requires prior written
 168 permission from Apple Inc.</P>
 169
 170
 171 <H2 CLASS="title"><A NAME="GPL">GNU GENERAL PUBLIC LICENSE</A></H2>
 172
 173 <P>Version 2, June 1991
 174
 175 <PRE>
 176 Copyright 1989, 1991 Free Software Foundation, Inc.
 177 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 178
 179 Everyone is permitted to copy and distribute verbatim
 180 copies of this license document, but changing it is not allowed.
 181 </PRE>
 182
 183 <H3>Preamble</H3>
 184
 185 <P>The licenses for most software are designed to take away your
 186 freedom to share and change it.  By contrast, the GNU General Public
 187 License is intended to guarantee your freedom to share and change free
 188 software--to make sure the software is free for all its users.  This
 189 General Public License applies to most of the Free Software
 190 Foundation's software and to any other program whose authors commit to
 191 using it.  (Some other Free Software Foundation software is covered by
 192 the GNU Library General Public License instead.)  You can apply it to
 193 your programs, too.
 194
 195 <P>When we speak of free software, we are referring to freedom, not
 196 price.  Our General Public Licenses are designed to make sure that you
 197 have the freedom to distribute copies of free software (and charge for
 198 this service if you wish), that you receive source code or can get it
 199 if you want it, that you can change the software or use pieces of it
 200 in new free programs; and that you know you can do these things.
 201
 202 <P>To protect your rights, we need to make restrictions that forbid
 203 anyone to deny you these rights or to ask you to surrender the rights.
 204 These restrictions translate to certain responsibilities for you if you
 205 distribute copies of the software, or if you modify it.
 206
 207 <P>For example, if you distribute copies of such a program, whether
 208 gratis or for a fee, you must give the recipients all the rights that
 209 you have.  You must make sure that they, too, receive or can get the
 210 source code.  And you must show them these terms so they know their
 211 rights.
 212
 213 <P>We protect your rights with two steps: (1) copyright the software, and
 214 (2) offer you this license which gives you legal permission to copy,
 215 distribute and/or modify the software.
 216
 217 <P>Also, for each author's protection and ours, we want to make certain
 218 that everyone understands that there is no warranty for this free
 219 software.  If the software is modified by someone else and passed on, we
 220 want its recipients to know that what they have is not the original, so
 221 that any problems introduced by others will not reflect on the original
 222 authors' reputations.
 223
 224 <P>Finally, any free program is threatened constantly by software
 225 patents.  We wish to avoid the danger that redistributors of a free
 226 program will individually obtain patent licenses, in effect making the
 227 program proprietary.  To prevent this, we have made it clear that any
 228 patent must be licensed for everyone's free use or not licensed at all.
 229
 230 <P>The precise terms and conditions for copying, distribution and
 231 modification follow.
 232
 233 <H3>GNU GENERAL PUBLIC LICENSE<BR>
 234 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION</H3>
 235
 236 <OL START="0">
 237
 238 <LI>This License applies to any program or other work which contains
 239 a notice placed by the copyright holder saying it may be distributed
 240 under the terms of this General Public License.  The "Program", below,
 241 refers to any such program or work, and a "work based on the Program"
 242 means either the Program or any derivative work under copyright law:
 243 that is to say, a work containing the Program or a portion of it,
 244 either verbatim or with modifications and/or translated into another
 245 language.  (Hereinafter, translation is included without limitation in
 246 the term "modification".)  Each licensee is addressed as "you".
 247
 248 <P>Activities other than copying, distribution and modification are not
 249 covered by this License; they are outside its scope.  The act of
 250 running the Program is not restricted, and the output from the Program
 251 is covered only if its contents constitute a work based on the
 252 Program (independent of having been made by running the Program).
 253 Whether that is true depends on what the Program does.
 254
 255 <LI>You may copy and distribute verbatim copies of the Program's
 256 source code as you receive it, in any medium, provided that you
 257 conspicuously and appropriately publish on each copy an appropriate
 258 copyright notice and disclaimer of warranty; keep intact all the
 259 notices that refer to this License and to the absence of any warranty;
 260 and give any other recipients of the Program a copy of this License
 261 along with the Program.
 262
 263 <P>You may charge a fee for the physical act of transferring a copy, and
 264 you may at your option offer warranty protection in exchange for a fee.
 265
 266 <LI>You may modify your copy or copies of the Program or any portion
 267 of it, thus forming a work based on the Program, and copy and
 268 distribute such modifications or work under the terms of Section 1
 269 above, provided that you also meet all of these conditions:
 270
 271 <OL TYPE="a">
 272
 273 <LI>You must cause the modified files to carry prominent notices
 274 stating that you changed the files and the date of any change.
 275
 276 <LI>You must cause any work that you distribute or publish, that in
 277 whole or in part contains or is derived from the Program or any
 278 part thereof, to be licensed as a whole at no charge to all third
 279 parties under the terms of this License.
 280
 281 <LI>if the modified program normally reads commands interactively
 282 when run, you must cause it, when started running for such
 283 interactive use in the most ordinary way, to print or display an
 284 announcement including an appropriate copyright notice and a
 285 notice that there is no warranty (or else, saying that you provide
 286 a warranty) and that users may redistribute the program under
 287 these conditions, and telling the user how to view a copy of this
 288 License.  (Exception: if the Program itself is interactive but
 289 does not normally print such an announcement, your work based on
 290 the Program is not required to print an announcement.)
 291
 292 </OL>
 293
 294 <P>These requirements apply to the modified work as a whole.  If
 295 identifiable sections of that work are not derived from the Program,
 296 and can be reasonably considered independent and separate works in
 297 themselves, then this License, and its terms, do not apply to those
 298 sections when you distribute them as separate works.  But when you
 299 distribute the same sections as part of a whole which is a work based
 300 on the Program, the distribution of the whole must be on the terms of
 301 this License, whose permissions for other licensees extend to the
 302 entire whole, and thus to each and every part regardless of who wrote it.
 303
 304 <P>Thus, it is not the intent of this section to claim rights or contest
 305 your rights to work written entirely by you; rather, the intent is to
 306 exercise the right to control the distribution of derivative or
 307 collective works based on the Program.
 308
 309 <P>In addition, mere aggregation of another work not based on the Program
 310 with the Program (or with a work based on the Program) on a volume of
 311 a storage or distribution medium does not bring the other work under
 312 the scope of this License.
 313
 314 <LI>You may copy and distribute the Program (or a work based on it,
 315 under Section 2) in object code or executable form under the terms of
 316 Sections 1 and 2 above provided that you also do one of the following:
 317
 318 <OL TYPE="a">
 319
 320 <LI>Accompany it with the complete corresponding machine-readable
 321 source code, which must be distributed under the terms of Sections
 322 1 and 2 above on a medium customarily used for software interchange; or,
 323
 324 <LI>Accompany it with a written offer, valid for at least three
 325 years, to give any third party, for a charge no more than your
 326 cost of physically performing source distribution, a complete
 327 machine-readable copy of the corresponding source code, to be
 328 distributed under the terms of Sections 1 and 2 above on a medium
 329 customarily used for software interchange; or,
 330
 331 <LI>Accompany it with the information you received as to the offer
 332 to distribute corresponding source code.  (This alternative is
 333 allowed only for noncommercial distribution and only if you
 334 received the program in object code or executable form with such
 335 an offer, in accord with Subsection b above.)
 336
 337 </OL>
 338
 339 <P>The source code for a work means the preferred form of the work for
 340 making modifications to it.  For an executable work, complete source
 341 code means all the source code for all modules it contains, plus any
 342 associated interface definition files, plus the scripts used to
 343 control compilation and installation of the executable.  However, as a
 344 special exception, the source code distributed need not include
 345 anything that is normally distributed (in either source or binary
 346 form) with the major components (compiler, kernel, and so on) of the
 347 operating system on which the executable runs, unless that component
 348 itself accompanies the executable.
 349
 350 <P>If distribution of executable or object code is made by offering
 351 access to copy from a designated place, then offering equivalent
 352 access to copy the source code from the same place counts as
 353 distribution of the source code, even though third parties are not
 354 compelled to copy the source along with the object code.
 355
 356 <LI>You may not copy, modify, sublicense, or distribute the Program
 357 except as expressly provided under this License.  Any attempt
 358 otherwise to copy, modify, sublicense or distribute the Program is
 359 void, and will automatically terminate your rights under this License.
 360 However, parties who have received copies, or rights, from you under
 361 this License will not have their licenses terminated so long as such
 362 parties remain in full compliance.
 363
 364 <LI>You are not required to accept this License, since you have not
 365 signed it.  However, nothing else grants you permission to modify or
 366 distribute the Program or its derivative works.  These actions are
 367 prohibited by law if you do not accept this License.  Therefore, by
 368 modifying or distributing the Program (or any work based on the
 369 Program), you indicate your acceptance of this License to do so, and
 370 all its terms and conditions for copying, distributing or modifying
 371 the Program or works based on it.
 372
 373 <LI>Each time you redistribute the Program (or any work based on the
 374 Program), the recipient automatically receives a license from the
 375 original licensor to copy, distribute or modify the Program subject to
 376 these terms and conditions.  You may not impose any further
 377 restrictions on the recipients' exercise of the rights granted herein.
 378 You are not responsible for enforcing compliance by third parties to
 379 this License.
 380
 381 <LI>If, as a consequence of a court judgment or allegation of patent
 382 infringement or for any other reason (not limited to patent issues),
 383 conditions are imposed on you (whether by court order, agreement or
 384 otherwise) that contradict the conditions of this License, they do not
 385 excuse you from the conditions of this License.  If you cannot
 386 distribute so as to satisfy simultaneously your obligations under this
 387 License and any other pertinent obligations, then as a consequence you
 388 may not distribute the Program at all.  For example, if a patent
 389 license would not permit royalty-free redistribution of the Program by
 390 all those who receive copies directly or indirectly through you, then
 391 the only way you could satisfy both it and this License would be to
 392 refrain entirely from distribution of the Program.
 393
 394 <P>If any portion of this section is held invalid or unenforceable under
 395 any particular circumstance, the balance of the section is intended to
 396 apply and the section as a whole is intended to apply in other
 397 circumstances.
 398
 399 <P>It is not the purpose of this section to induce you to infringe any
 400 patents or other property right claims or to contest validity of any
 401 such claims; this section has the sole purpose of protecting the
 402 integrity of the free software distribution system, which is
 403 implemented by public license practices.  Many people have made
 404 generous contributions to the wide range of software distributed
 405 through that system in reliance on consistent application of that
 406 system; it is up to the author/donor to decide if he or she is willing
 407 to distribute software through any other system and a licensee cannot
 408 impose that choice.
 409
 410 <P>This section is intended to make thoroughly clear what is believed to
 411 be a consequence of the rest of this License.
 412
 413 <LI>If the distribution and/or use of the Program is restricted in
 414 certain countries either by patents or by copyrighted interfaces, the
 415 original copyright holder who places the Program under this License
 416 may add an explicit geographical distribution limitation excluding
 417 those countries, so that distribution is permitted only in or among
 418 countries not thus excluded.  In such case, this License incorporates
 419 the limitation as if written in the body of this License.
 420
 421 <LI>The Free Software Foundation may publish revised and/or new versions
 422 of the General Public License from time to time.  Such new versions will
 423 be similar in spirit to the present version, but may differ in detail to
 424 address new problems or concerns.
 425
 426 <P>Each version is given a distinguishing version number.  If the Program
 427 specifies a version number of this License which applies to it and "any
 428 later version", you have the option of following the terms and conditions
 429 either of that version or of any later version published by the Free
 430 Software Foundation.  If the Program does not specify a version number of
 431 this License, you may choose any version ever published by the Free Software
 432 Foundation.
 433
 434 <LI>If you wish to incorporate parts of the Program into other free
 435 programs whose distribution conditions are different, write to the author
 436 to ask for permission.  For software which is copyrighted by the Free
 437 Software Foundation, write to the Free Software Foundation; we sometimes
 438 make exceptions for this.  Our decision will be guided by the two goals
 439 of preserving the free status of all derivatives of our free software and
 440 of promoting the sharing and reuse of software generally.
 441
 442 </OL>
 443
 444 <H3>NO WARRANTY</H3>
 445
 446 <OL START="11">
 447
 448 <LI>BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 449 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
 450 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
 451 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
 452 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 453 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
 454 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
 455 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
 456 REPAIR OR CORRECTION.
 457
 458 <LI>IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 459 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
 460 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
 461 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
 462 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
 463 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
 464 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 465 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 466 POSSIBILITY OF SUCH DAMAGES.
 467
 468 </OL>
 469
 470 <H3>END OF TERMS AND CONDITIONS</H3>
 471
 472 <H3>How to Apply These Terms to Your New Programs</H3>
 473
 474 <P>If you develop a new program, and you want it to be of the greatest
 475 possible use to the public, the best way to achieve this is to make it
 476 free software which everyone can redistribute and change under these terms.
 477
 478 <P>To do so, attach the following notices to the program.  It is safest
 479 to attach them to the start of each source file to most effectively
 480 convey the exclusion of warranty; and each file should have at least
 481 the "copyright" line and a pointer to where the full notice is found.
 482
 483 <PRE>
 484 <VAR>one line to give the program's name and an idea of what it does.</VAR>
 485 Copyright (C) <VAR>yyyy</VAR>  <VAR>name of author</VAR>
 486
 487 This program is free software; you can redistribute it and/or
 488 modify it under the terms of the GNU General Public License
 489 as published by the Free Software Foundation; either version 2
 490 of the License, or (at your option) any later version.
 491
 492 This program is distributed in the hope that it will be useful,
 493 but WITHOUT ANY WARRANTY; without even the implied warranty of
 494 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 495 GNU General Public License for more details.
 496
 497 You should have received a copy of the GNU General Public License
 498 along with this program; if not, write to the Free Software
 499 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 500 </PRE>
 501
 502 <P>Also add information on how to contact you by electronic and paper mail.
 503
 504 <P>If the program is interactive, make it output a short notice like this
 505 when it starts in an interactive mode:
 506
 507 <PRE>
 508 Gnomovision version 69, Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR>
 509 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
 510 type `show w'.  This is free software, and you are welcome
 511 to redistribute it under certain conditions; type `show c'
 512 for details.
 513 </PRE>
 514
 515 <P>The hypothetical commands <SAMP>`show w'</SAMP> and <SAMP>`show c'</SAMP> should show
 516 the appropriate parts of the General Public License.  Of course, the
 517 commands you use may be called something other than <SAMP>`show w'</SAMP> and
 518 <SAMP>`show c'</SAMP>; they could even be mouse-clicks or menu items--whatever
 519 suits your program.
 520
 521 <P>You should also get your employer (if you work as a programmer) or your
 522 school, if any, to sign a "copyright disclaimer" for the program, if
 523 necessary.  Here is a sample; alter the names:
 524
 525 <PRE>
 526 Yoyodyne, Inc., hereby disclaims all copyright
 527 interest in the program `Gnomovision'
 528 (which makes passes at compilers) written
 529 by James Hacker.
 530
 531 <VAR>signature of Ty Coon</VAR>, 1 April 1989
 532 Ty Coon, President of Vice
 533 </PRE>
 534
 535 <H2 CLASS="title"><A NAME="LGPL">GNU LIBRARY GENERAL PUBLIC LICENSE</A></H2>
 536
 537 <P>Version 2, June 1991
 538
 539 <PRE>
 540 Copyright (C) 1991 Free Software Foundation, Inc.
 541 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
 542 Everyone is permitted to copy and distribute verbatim copies
 543 of this license document, but changing it is not allowed.
 544
 545 [This is the first released version of the library GPL.  It is
 546  numbered 2 because it goes with version 2 of the ordinary GPL.]
 547 </PRE>
 548
 549 <H3>Preamble</H3>
 550
 551 <P>The licenses for most software are designed to take away your
 552 freedom to share and change it.  By contrast, the GNU General Public
 553 Licenses are intended to guarantee your freedom to share and change
 554 free software--to make sure the software is free for all its users.
 555
 556 <P>This license, the Library General Public License, applies to some
 557 specially designated Free Software Foundation software, and to any
 558 other libraries whose authors decide to use it.  You can use it for
 559 your libraries, too.
 560
 561 <P>When we speak of free software, we are referring to freedom, not
 562 price.  Our General Public Licenses are designed to make sure that you
 563 have the freedom to distribute copies of free software (and charge for
 564 this service if you wish), that you receive source code or can get it
 565 if you want it, that you can change the software or use pieces of it
 566 in new free programs; and that you know you can do these things.
 567
 568 <P>To protect your rights, we need to make restrictions that forbid
 569 anyone to deny you these rights or to ask you to surrender the rights.
 570 These restrictions translate to certain responsibilities for you if
 571 you distribute copies of the library, or if you modify it.
 572
 573 <P>For example, if you distribute copies of the library, whether gratis
 574 or for a fee, you must give the recipients all the rights that we gave
 575 you.  You must make sure that they, too, receive or can get the source
 576 code.  If you link a program with the library, you must provide
 577 complete object files to the recipients so that they can relink them
 578 with the library, after making changes to the library and recompiling
 579 it.  And you must show them these terms so they know their rights.
 580
 581 <P>Our method of protecting your rights has two steps: (1) copyright
 582 the library, and (2) offer you this license which gives you legal
 583 permission to copy, distribute and/or modify the library.
 584
 585 <P>Also, for each distributor's protection, we want to make certain
 586 that everyone understands that there is no warranty for this free
 587 library.  If the library is modified by someone else and passed on, we
 588 want its recipients to know that what they have is not the original
 589 version, so that any problems introduced by others will not reflect on
 590 the original authors' reputations.
 591
 592 <P>Finally, any free program is threatened constantly by software
 593 patents.  We wish to avoid the danger that companies distributing free
 594 software will individually obtain patent licenses, thus in effect
 595 transforming the program into proprietary software.  To prevent this,
 596 we have made it clear that any patent must be licensed for everyone's
 597 free use or not licensed at all.
 598
 599 <P>Most GNU software, including some libraries, is covered by the ordinary
 600 GNU General Public License, which was designed for utility programs.  This
 601 license, the GNU Library General Public License, applies to certain
 602 designated libraries.  This license is quite different from the ordinary
 603 one; be sure to read it in full, and don't assume that anything in it is
 604 the same as in the ordinary license.
 605
 606 <P>The reason we have a separate public license for some libraries is that
 607 they blur the distinction we usually make between modifying or adding to a
 608 program and simply using it.  Linking a program with a library, without
 609 changing the library, is in some sense simply using the library, and is
 610 analogous to running a utility program or application program.  However, in
 611 a textual and legal sense, the linked executable is a combined work, a
 612 derivative of the original library, and the ordinary General Public License
 613 treats it as such.
 614
 615 <P>Because of this blurred distinction, using the ordinary General
 616 Public License for libraries did not effectively promote software
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1043 <P>Also add information on how to contact you by electronic and paper mail.
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1049 <PRE>
1050 Yoyodyne, Inc., hereby disclaims all copyright interest in
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1053
1054 <VAR>signature of Ty Coon</VAR>, 1 April 1990
1055 Ty Coon, President of Vice
1056 </PRE>
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1058 <P>That's all there is to it!
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