Linux

Linux dominates the operating system landscape, running 99% of the world's supercomputers and 96% of cloud servers, while powering over 3 billion Android devices. With 30+ million lines of code contributed by 15,000+ developers since its 1991 release by Linus Torvalds, it remains the most collaborative software project in history. Outperforms #2 Apache Web Server in sheer infrastructure influence, as Linux's kernel underpins the majority of web servers that Apache runs on.