Linux

A popular operating system (OS) that is free, open source, and offers users access to the source code.

Linux is one of the most popular operating systems (OSes) at present, along with Windows and MacOs. The system is built as a computer kernel, with modifiable components to allow users develop programs without restrictions. Moreover, the OS is light compared to Windows and MacOS, and therefore promotes fast computer processing.

Linux is popular for a number of reasons. One, it is free of charge. Secondly, users have access to its source code, meaning that they have greater leverage to build systems of their own. The only minus to using the Linux OS is that it is kernel-like, so it requires additional tools to use efficiently, unless the user has sophisticated programming/coding knowledge.