What is Open Source Software?
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What is Open Source?
Open source software has publicly available source code that anyone can view, modify, and distribute. It powers most of the modern internet — Linux, Git, and more.
Open Source vs Proprietary
| Aspect | Open Source | Proprietary |
|---|---|---|
| Source code | Public | Hidden |
| Cost | Usually free | Usually paid |
| Modify | Yes | No |
| Examples | Linux, Firefox | Windows, Photoshop |
Famous Open Source Projects
- Linux — operating system.
- Git — version control.
- React, Node.js — web development.
- VS Code — code editor.
Common Licenses
| License | Note |
|---|---|
| MIT | Very permissive |
| GPL | Must share changes |
| Apache 2.0 | Permissive + patent grant |
Why Contribute?
Build skills, portfolio, and reputation. See our guide on contributing to open source.
FAQs
Is open source really free?
Usually free to use, but check the license for restrictions. More in our Software section.
Is it safe?
Often more secure — many eyes review the public code.