Redundant array of independent networks, commonly known as RAID, is a system of multiple hard drives that work together to improve data storage and enhance performance. There are several synonyms for this term, including disk array, storage array, and clustered storage. These terms refer to the same concept of using multiple hard drives to mirror and distribute data, providing redundancy and fault tolerance. Other related terms include SAN (Storage Area Network), NAS (Network Attached Storage), and software-defined storage, which can also be used to describe the organization and management of data storage systems. In summary, while RAID is a common term for this technology, there are several different ways to refer to the concept of distributed and redundant data storage.