Commercial software is computer software sold for commercial purposes or that serves commercial purposes. Commercial software is most often proprietary software, but free software is also used as commercial software.

     All or parts of software packages and services that support commerce are increasingly made available as free software.

     A final aspect of software innovation is its evaluation. The benefits of software innovation, and its effects often lie many years in the future.

   Marketing involvement is also known as software requirements analysis. Because software development may involve compromising or going beyond what is required by the client, a software development project may stray into processes not usually associated with engineering such as market

    It is often difficult to isolate whether engineering or marketing is more responsible for the success or failure of a software product to satisfy customer expectations.

    This is why it is important to understand both processes and/or facilitate collaboration between both engineering and marketing in the total software development process.