CentOS is an abbreviation for Community Enterprise Operating System. This is one of the leading Linux releases for servers and it is recognized as being one of the most stable and secure Operating Systems available. CentOS is open-source software, which means that you can customize it in whatever way you see fit, adding and removing packages or changing the code of all of them. It is also free to distribute and use, so you won't have to pay any license fees, meaning that the overall price that you will have to pay for a server making use of CentOS will be more affordable than the price for a server running some other OS. What makes CentOS unique among other Linux releases is its huge developer community, which will help you find the answer to any question or problem you might have. What's more, each version that is released officially is supported for 10 years, that's is longer than with any other operating system. This means routine safety and stability updates that will provide a stable software environment for your web applications in the long run.