This lecture iwas talk about free software. "Free" has "freedom"and "free" double meaning, and therefore how to distinguish between free software (libre) and free software (gratis)? The free software movement's founder - Richard Stallman provides the following definition: 'free software is focused on the right to freedom, not price. To learn more about the concept it represents, you should be "free" If you want to be "free speech" rather than "free beer" '. More accurate to say that free software on behalf of computer users have a choice and the freedom of any person in cooperation, with the software they use to control the freedom. In the GNU Declaration (GNU Manifesto) contains Stallman at the start of free software definition of confusion.
Well-known free software
Linux
PHP
MySQL
BSD
Most of the free software are online (online) publishing, and do not charge any fees; or off-line (off-line) way to release physical, sometimes small additional fees for a minimum of cost (for example: nominal fee), and people can be any price to sell the software. However, free software and commercial software can do it together, because they exist side by side against trafficking in software is a violation of the free software definition.
Users must accept the software, 'software license' to use the software, but in the free software, the most common way to license GPL - GNU General Public License has.
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