Linux
From Market Ruler Help
Linux is a family of open source Unix-like operating systems based on the Linux kernel, a kernel first released in 1991 by Linus Torvalds.
Linux is the basis of the Android operating system as well as the predominant operating system running the world's internet servers; and is considered to have the the most widely installed base of general purpose operating systems in the world today.
For modern marketers, users who typically come from this platform tend to be more advanced developers and software engineers – or robots.