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Sunday, 29 July 2012

TYPES OF OPEN SOURCE SOFTWARE LICENSES

Masschusetts Institute of Technology (MIT)
  • It is a free software license, means that is permits reuse within proprietary software provided all copies of the licensed software include of the MIT license term
  • Originally developed at the Masschusetts Institute of Technology
  • It is permissive license that allows the programmers to put the code in proprietary software on the condition that the license is given with that software
  • It may refer to the"Expat License" or more accurately called the "X11 license" because it was first written for the X Window System
  • It already published on official site at open source Initiative

General Public License (GPL)
  •  It created by the Free Software Foundation (FSF) as licenses applicable to software that can be use freely
  • Also called as General Public License (GNU) or Library General Public License (LGPL)
  • It was originally written by Richard Stallman for the GNU project
  • GPL is an application of the copyleft principles that derivative work must be distributed under the same terms as the original
  • Any modification of to GPL licensed software must also be released under the GPL license
  • Compared to GPL, LGPL applies a narrower interpretation of derivative works whereas is a modified version of the original source code

Berkeley Software Distribution (BSD)
  • Are family of permissive free software licenses
  • BSD was first written at the University of California, Berkeley for distributing a Unix-like operating system  and because of this, it make the original owners of the BSD were the Regents of the University of California
  •  Because it has a few restrictions, it is often used by universities and the like for the products of research
  • The license places minimal restrictions on how the software can be redistributed
  • The first version of the license was revised and the resulting licenses are more properly called modified BSD licenses

Mozilla Public Licenses (MPL)
  • MPL are developed and maintained by Mozilla Foundation
  • This software license also created by Netscape for its open-source web browser
  • It is characterized as a hybridization of the modified BSD license and GNU General Public License (GPL) that seeks to balance the concerns of proprietary and open source developers
  • MPL has been approved as both a free software license by the Free Software Foundation (FSF) and an open-source software license by the Open Source Initiative
  • Its allows covered source code to be mixed with other files under a different, even proprietary license
  • If we modify source code that was published under this license, we are obliged to release it under the same license. However, if  we develop an original module as an addition to it, that restriction does not apply
  • MPL is the license for the Mozilla Application suite, Mozilla Firefox, Mozilla Thunderbird and other Mozilla software but it has been used by such as Adobe to license their Flex product line


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