CentOS is an abbreviation for Community Enterprise OS. This is one of the top Linux distributions for servers and it is recognized as one of the most stable and risk-free Operating Systems available. CentOS is open-source software, so you are able to personalize it in whatever way you see fit, adding and removing packages or modifying the code of all of them. It is also free to distribute and use, so you won't need to pay any license fees, meaning that the total price that you'll need to pay for a server making use of CentOS will be much lower than the price for a server working with an alternative OS. What makes CentOS unique among other Linux releases is its huge developer community, that will help you find the answer to any kind of question or problem you may have. What's more, each version which is released officially is supported for a decade, which is a lot longer than with any alternative OS. What this means is frequent security and stability updates that provides a dependable software environment for all your web applications in the long run.