Open source software refers to the software which source is open. Closed source software refers to the software which source code is closed.

Support and Service. Dual Licensing. Open core and paid additional modules. Certification Fees. Donations. Sponsors. Training. Hosting of OSS.

Proprietary refers to software that is owned by the individual or comapny who published it. Open source refers to software that is available for anyone to access or change the code.

Linux powers the majority of the world’s servers. Linux is everywhere. Linux is highly customizable. Linux is more secure than other operating systems. Linux is faster than other operating systems. Linux is free. Linux has a vast community. Linux is used by governments and space agencies.