Resumen
Open source is a term that has recently gained currency as a way to describe the tradition of open standards, shared source code and collaborative development behind software such as the Linux and FreeBSD operating systems, the Apache Web server, the Perl, Tcl, and Python languages, and much of the Internet infrastructure, including Bind, the Sendmail mail server and many other programs. Officially, open source, which is a trademark of the Open Source Initiative, means more than that source code is available. The source must be available for redistribution without restriction and without charge, and the license must permit the creation of modifications and derivative works and must allow those derivatives to be redistributed under the same terms as the original work. Licenses that lower barriers to cooperation are a key part of the open-source phenomenon. But open source is more than just a matter of licenses. Many open-source projects have been started to solve a user's particular problem.