All Drupal code is Copyright 2001 - present by the original authors.

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 2 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 as the file LICENSE.txt; if not, please see
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Drupal is a registered trademark of Dries Buytaert.

Drupal includes works under other copyright notices and distributed
according to the terms of the GNU General Public License or a compatible
license, including:

JavaScript

  Backbone - Copyright (c) 2010 Jeremy Ashkenas and DocumentCloud

  CKEditor5 - Copyright (c) 2003 CKSource Holding sp. z o.o.

  JavaScript Cookie - Copyright (c) 2018 Copyright 2018 Klaus Hartl, Fagner Brack, GitHub Contributors

  jQuery - Copyright (c) OpenJS Foundation and other contributors

  jQuery Form - Copyright (c) 2017 Kevin Morris

  jQuery UI - Copyright (c) OpenJS Foundation and other contributors

  LoadJS - Copyright (c) 2015 Andres Morey

  Modernizr - Copyright (c) 2021 The Modernizr Team

  Shepherd - Copyright (c) 2021

  Sortable - Copyright (c) 2019 All contributors to Sortable

  Tabbable - Copyright (c) 2015 David Clark

  Underscore.js - Copyright (c) 2009 Jeremy Ashkenas, Julian Gonggrijp, and
   DocumentCloud and Investigative Reporters & Editors

CSS

  Normalize.css - Copyright (c) Nicolas Gallagher and Jonathan Neal

PHP

  Drupal depends on numerous PHP Composer packages. All Composer packages
    retain the copyright of the authors.

Brand materials

  Drupal brand materials under core/misc/logo have a dedicated license. See
  core/misc/logo/LICENSE.txt.