Question

chapter 3 quiz tech at your service (v) __ is an open source operating system with hundreds of distributions that are available commercially or as a free download. windows unix macos linux done

Explanation:

Windows is proprietary. Unix has some open - source variants but not as widespread as Linux in terms of distributions. macOS is also proprietary. Linux is well - known as an open - source operating system with numerous distributions available commercially or for free.

Answer:

Linux