ARINC (Aeronautical Radio, Incorporated) backplane connectors are used in high reliability applications in the aviation, airport, defense, government, healthcare, network, security, and transportation industries. ARINC developed the standards for the trays and boxes used to hold standard line-replaceable units (like radios) in aircraft, allowing electronics to be rapidly replaced without complex fasteners or test equipment. The backplane connectors are selected by their features, shell style and size, class code, and cavity type (A-F). Cavity type may include open, A524, 13W2, 57, 100, and 150.