Developed by Red Hat, Red Hat Enterprise Linux, colloquially abbreviated as RHEL, is a commercial open-source Linux distribution tailored for the enterprise market. It is available for both server and desktop versions. For servers, it is available for x86-64, IBM Z, ARM64, and Power ISA. For the desktop version, it is available for the x86-64 architecture.
The Upstream project on which Red Hat Enterprise Linux major releases are based is Fedora Linux. This is where crucial OS innovations are introduced and thoroughly tested.