Open-source software (OSS) is a form of computer software in which the source code is made available under a license that allows users to use, review, modify, and distribute the software to anyone and for any reason. Open-source software can be created in a public, collaborative environment. Open sharing is exemplified by open-source applications.
According to Perens (co-founder of Open-source Initiative), open source is a large software license that makes source code available to the general public with little or no restrictions on use and modification.
Most computer users never see “source code,” which is the code that computer programmers may modify to alter how a piece of software—a “program” or “application”—works. Programmers who have access to the source code of a computer program may enhance it by adding new functionality or repairing sections that don’t always function correctly.
For a variety of reasons, people prefer open source software to proprietary software, including: