diff --git a/README.org b/README.org
index f4071ce..907b707 100644
--- a/README.org
+++ b/README.org
@@ -20,12 +20,26 @@
:END:
This README contains my Emacs setup for use with Go, LaTeX, Lisp, Org, and Python.
-
Copyright \copy 2021-2023 Gerard Vermeulen.
#+BEGIN_QUOTE
-Permission is granted to copy, distribute and/or modify this
-document under the terms of the GNU Free Documentation License,
+All Org-mode source blocks with function definitions in this document are free
+software: you can redistribute it and/or modify it under the terms of the GNU
+General Public License as published by the Free Software Foundation, either
+version 3 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see .
+#+END_QUOTE
+
+#+BEGIN_QUOTE
+Permission is granted to copy, distribute and/or modify the other parts
+of this document under the terms of the GNU Free Documentation License,
Version 1.3 or any later version published by the Free Software
Foundation; with no Invariant Sections, with no Front-Cover Texts,
and with no Back-Cover Texts. A copy of the license is included in
@@ -7368,6 +7382,14 @@ audio_output {
;;; init.el ends here
#+end_src
+* GNU General Public License
+:PROPERTIES:
+:CUSTOM_ID: sec:gnu-gpl
+:END:
+
+# I changed the output of pandoc -t org -o gpl-3.0.org gpl-3.0.md:
+#+include: gpl-3.0.org
+
* GNU Free Documentation License
:PROPERTIES:
:CUSTOM_ID: sec:gnu-fdl
diff --git a/gpl-3.0.org b/gpl-3.0.org
new file mode 100644
index 0000000..86113f6
--- /dev/null
+++ b/gpl-3.0.org
@@ -0,0 +1,702 @@
+# The GNU Free Documentation License.
+#+begin_center
+Version 3, 29 June 2007
+#+end_center
+
+# This file is intended to be included within another document.
+
+#+begin_verse
+Copyright (C) 2007 Free Software Foundation, Inc. [[https://fsf.org/]]
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+#+end_verse
+
+#+begin_center
+*Preamble*
+#+end_center
+
+The GNU General Public License is a free, copyleft license for software
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+
+The licenses for most software and other practical works are designed to
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+GNU General Public License for most of our software; it applies also to
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+your programs, too.
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+When we speak of free software, we are referring to freedom, not price.
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+ A patent license is "discriminatory" if it does not include within the
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+
+ Nothing in this License shall be construed as excluding or limiting any
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+ available to you under applicable patent law.
+
+12. [@12] *No Surrender of Others' Freedom*.
+
+ If conditions are imposed on you (whether by court order, agreement or
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+ covered work so as to satisfy simultaneously your obligations under this
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+ may not convey it at all. For example, if you agree to terms that
+ obligate you to collect a royalty for further conveying from those to
+ whom you convey the Program, the only way you could satisfy both those
+ terms and this License would be to refrain entirely from conveying the
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+
+13. [@13] *Use with the GNU Affero General Public License*.
+
+ Notwithstanding any other provision of this License, you have permission
+ to link or combine any covered work with a work licensed under version 3
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+
+14. [@14] *Revised Versions of this License*.
+
+ The Free Software Foundation may publish revised and/or new versions of
+ the GNU General Public License from time to time. Such new versions will
+ be similar in spirit to the present version, but may differ in detail to
+ address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the Program
+ specifies that a certain numbered version of the GNU General Public
+ License "or any later version" applies to it, you have the option of
+ following the terms and conditions either of that numbered version or of
+ any later version published by the Free Software Foundation. If the
+ Program does not specify a version number of the GNU General Public
+ License, you may choose any version ever published by the Free Software
+ Foundation.
+
+ If the Program specifies that a proxy can decide which future versions
+ of the GNU General Public License can be used, that proxy's public
+ statement of acceptance of a version permanently authorizes you to
+ choose that version for the Program.
+
+ Later license versions may give you additional or different permissions.
+ However, no additional obligations are imposed on any author or
+ copyright holder as a result of your choosing to follow a later version.
+
+15. [@15] *Disclaimer of Warranty*.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+ APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+ HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
+ WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF
+ THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. [@15] *Limitation of Liability*.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+ WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+ CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+ INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+ NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES
+ SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE
+ WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN
+ ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. [@16] *Interpretation of Sections 15 and 16*.
+
+ If the disclaimer of warranty and limitation of liability provided above
+ cannot be given local legal effect according to their terms, reviewing
+ courts shall apply local law that most closely approximates an absolute
+ waiver of all civil liability in connection with the Program, unless a
+ warranty or assumption of liability accompanies a copy of the Program in
+ return for a fee.
+
+#+begin_center
+*END OF TERMS AND CONDITIONS*
+#+end_center
+
+** How to Apply These Terms to Your New Programs
+:PROPERTIES:
+:CUSTOM_ID: how-to-apply-these-terms-to-your-new-programs
+:END:
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+#+begin_example
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+#+end_example
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice
+like this when it starts in an interactive mode:
+
+#+begin_example
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+#+end_example
+
+The hypothetical commands `show w' and `show c' should show the
+appropriate parts of the General Public License. Of course, your
+program's commands might be different; for a GUI interface, you would
+use an "about box".
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow the
+GNU GPL, see [[https://www.gnu.org/licenses/]].
+
+The GNU General Public License does not permit incorporating your
+program into proprietary programs. If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library. If this is what you want to do, use the
+GNU Lesser General Public License instead of this License. But first,
+please read [[https://www.gnu.org/licenses/why-not-lgpl.html]].