What is commercial software?
Commercial software is software or a program designed or developed for licensing or sale to end users for a commercial purpose. Commercial software used to be considered proprietary software, but now a number of free and open source software applications are licensed or sold to end users. Standard software programs, such as games or those sold in computer stores or even music stores and grocery stores, are some examples of commercial software.
Microsoft products such as the Windows operating system and MS Office are some of the best-known examples of commercial software.
Commercial software is typically licensed, not sold. Once upon a time there was the domain of proprietary software that was developed from the ground up by a specific company to solve a specific problem or fill a specific niche, and then licensed or sold to the people or organizations that needed it. This type of software includes finance, marketing and Accounting software. However, over the past few decades, some open source applications have become commercial software that is licensed to customers as part or as part of a service.
Contrary to popular belief, open source software doesn't necessarily mean free software. Depending on the distribution license, the first can be considered commercial software, but comes with the source code for customization. Some commercial software applications can also be used freely for non-commercial purposes.