Although the term free software had already been used loosely in the past,[11] Richard Stallman is credited with tying it to the sense under discussion and starting the free-software movement in 1983, when he launched the GNU Project: a collaborative effort to create a freedom-respecting operating system, and to revive the spirit of cooperation once prevalent among hackers during the early days of computing.[12][13]

Copyleft licenses, with the GNU General Public License being the most prominent: the author retains copyright and permits redistribution under the restriction that all such redistribution is licensed under the same license. Additions and modifications by others must also be licensed under the same "copyleft" license whenever they are distributed with part of the original licensed product. This is also known as a viral, protective, or reciprocal license. Due to the restriction on distribution not everyone considers this type of license to be free.[35][36]
Use Call-to-Action ads to draw consumers towards exclusive (free) information in exchange for an email address. For example, creating an EBook called “The future of B2B Lead Generation” will get attention and adding CTA such as “Get it free only for today!” pushes the person to download the book and creates an opportunity to get their contact details.
In fact, such a movement exists, and you can be part of it. The free software movement was started in 1983 by computer scientist Richard M. Stallman, when he launched a project called GNU, which stands for “GNU is Not UNIX”, to provide a replacement for the UNIX operating system—a replacement that would respect the freedoms of those using it. Then in 1985, Stallman started the Free Software Foundation, a nonprofit with the mission of advocating and educating on behalf of computer users around the world.
Many people new to free software find themselves confused because the word "free" in the term "free software" is not used the way they expect. To them free means "at no cost". An English dictionary lists almost twenty different meanings for "free". Only one of them is "at no cost". The rest refer to liberty and lack of constraint. When we speak of Free Software, we mean freedom, not price.
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