- OS software is free.
- OS software is Copylefted: They open the source code to the public. This is the basis for open collaboration.
- OS model is efficient: Also more people are collaborating, sharing their source code. Software development is more efficient in time, costwise.
- High quality software: Because it’s open bug fixing model, bug are found quickly and resolved quickly, so the result is more stable software.
- Flexible programming: Because the source code is open, one can change the source code and develop a customized software.
- The strength of open source model is copyleft, efficiency, quality, and flexibility.