Linux

The dominant open-source, Unix-like operating system kernel (created by Linus Torvalds in 1991), powering 90% of the public cloud, all top 500 supercomputers, and the Android platform.

Linux is the robust, open-source, Unix-like operating system kernel, first released by Linus Torvalds in 1991. It serves as the core for countless distributions (e.g., Ubuntu, Fedora, Debian) and is the backbone of modern infrastructure. Specifically, Linux runs over 90% of the public cloud workload, powers all of the world's top 500 supercomputers, and is the foundation for the Android mobile OS (with over 3 billion active devices). Its stability, security, and free licensing model (GPL) drive widespread adoption across servers, embedded systems, and developer desktops globally: it is the industry standard.

https://www.linux.org/