Free and open source software

Free Software: Software that allows the user to freely review, modify, copy and distribute software and make the source code of the software available to users.

The term “free” means freedom of action, not free, and they can be priced at a premium.

Software that is not free is call Proprietary Software.

Open Source: In free software, because of the ambiguity in the term Free, which was consider to be inadvertently free and possibly worthless, they became verify as open source.

Free / Open Source Software (FOSS): Free software and open source software are one in the nature of work, in fact all free software is open source software.

So both free and open source are using for these two software.

Commercial Software: Software usually designed by a company and sold for profit, these software can be proprietary or free.

Publication of works under public ownership is a major problem,

with minor modifications to the work being able to publish it with an exclusive license. Copyleft license is use to overcome this problem.

Copyleft: This law, unlike copyright,

prevents the work from being copyright and grants anyone the copyright to edit the work and

No one is allow to deprive other people of the right to edit and copy. An © is the opposite of copyright.

Various licenses have been create by the Free Software Foundation (FOF) for copyright use. Some of these licenses:

GPL (GNU General Public License): This license was created to apply the software to their software and source code.

LGPL (GNU Lesser General Public License): This license was created to apply copyright to software libraries.

GFDL (GNU Free Documentation License): This license allows users to edit and redistribute software documentation.

Libraries: If you are not a developer, you are unlikely to deal with libraries directly.

Libraries are a set of programming functions that can be used by different applications.

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