EOS is a disk-based storage system providing high-capacity and low-latency access for users at CERN. It is the online storage system for all LHC and most non-LHC experimts at CERN.
Today EOS provides over 120 PB of raw disk space. The software is developed since 2010 at CERN and available under GPL license. EOS drives CERNBox as back-end storage system and provides sync-and-share facilities to CERN users.