What is Open Source Software?
Open-source software (OSS) is a type of computer software in which source code is released under a license in which the copyright holder grants users the rights to study, change, and distribute the software to anyone and for any purpose. Open-source software may be developed in a collaborative public manner. Open-source software is a prominent example of open collaboration.
St. Laurent, Andrew M. (2008). Understanding Open
Source and Free Software Licensing. O’Reilly Media. p. 4.