Scientific Linux is a recompiled Red Hat Enterprise Linux, co-developed by Fermi National Accelerator Laboratory and the European Organization for Nuclear Research (CERN). Although it aims to be fully compatible with Red Hat Enterprise Linux, it also provides additional packages not found in the upstream product; the most notable among these are various file systems, including Cluster Suite and Global File System (GFS), FUSE, OpenAFS, Squashfs and Unionfs, wireless networking support with Intel wireless firmware, MadWiFi and NDISwrapper, Sun Java and Java Development Kit (JDK), the lightweight IceWM window manager, R - a language and environment for statistical computing, and the Alpine email client. Scientific Linux is derived from Red Hat Enterprise Linux, with protected components, such as Red Hat trademarks, removed, thus making it freely available. New releases are typically produced about two months after each Red Hat release. As well as a full distribution equal to two DVDs, Scientific Linux is also available in LiveCD and LiveDVD versions. Scientific Linux offers wireless and Bluetooth out of the box, and it comes with a comprehensive range of software, such as multimedia codecs, Samba, and Compiz, as well as servers and clients, storage clients, networking, and system administration tools. It also contains a set of tools for making custom versions, thus allowing institutions and individuals to create their own variant.