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Copyleft (a play on the word copyright) is the practice of using copyright law to offer the right to distribute copies and modified versions of a work and requiring that the same rights be preserved in modified versions of the work. In other words, copyleft is a general method for making a creative work as freely available to be modified, and requiring all modified and extended versions of the creative work to be free as well. -- Wikipedia

Free content - Wikipedia

There is a whole menu of standardized licenses offering varied options that allow authors to choose the type of reuse of their work that they wish to authorize or forbid (for example the so-called Creative Commons licens
https://en.wikipedia.org/wiki/Free_content - Details - Similar

Various Licenses and Comments about Them - GNU Project - Free Software

GNU Operating System Supported by the Free Software Foundation
http://www.gnu.org/licenses/license-list.html - Details - Similar

Open-source software - Wikipedia

Open-source software development can bring in diverse perspectives beyond those of a single company. A 2024 estimate of the value of open source software to firms is $8.8 trillion as firms would need to spend 3.5 times t
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Open source - Wikipedia

Many open-source projects have a high economic value. According to the Battery Open Source Software Index (BOSS), the ten economically most important open-source projects are: 28 29
https://en.wikipedia.org/wiki/Open_source - Details - Similar

GNU Free Documentation License v1.3 - GNU Project - Free Software Foun

GNU Operating System Supported by the Free Software Foundation
http://www.gnu.org/copyleft/fdl.html - Details - Similar

Melbourne Mobile Detailing - About Us

Melbourne Mobile Detailing is established as the most trusted centre for car truck detailing, car truck cleaning and car paint protection in Melbourne.
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What is Free Software? - GNU Project - Free Software Foundation

Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.
https://www.gnu.org/philosophy/free-sw - Details - Similar

What is Free Software? - GNU Project - Free Software Foundation

Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.
http://www.gnu.org/philosophy/free-sw.html - Details - Similar

What is Free Software? - GNU Project - Free Software Foundation

Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.
https://www.gnu.org/philosophy/free-sw.html - Details - Similar

The GNU General Public License v3.0 - GNU Project - Free Software Foun

GNU Operating System Supported by the Free Software Foundation
http://www.gnu.org/copyleft/gpl.html - Details - Similar

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