CoreOS belongs to the minimalist Container-optimized OS category. CoreOS is the first OS in this category and many new OSes have appeared recently in the same category. CoreOS's mission is to improve the security and reliability of the Internet. CoreOS is a pioneer in this space and its first alpha release was in July 2013. A lot of developments have happened in the past two years in the area of networking, distributed storage, container runtime, authentication, and security. CoreOS is used by PaaS providers (such as Dokku and Deis), Web application development companies, and many enterprise and service providers developing distributed applications.
The following are some of the key CoreOS properties: