 CDC also co-developed the now universal Advanced Technology Attachment (ATA) interface with Compaq and Western Digital, which was aimed at lowering the cost of adding low-performance drives.CDC founded a separate division called "Rigidyne" in Simi Valley, California, to develop 3.5-inch drives using technology from the Wren series.These were marketed by CDC as the "Swift" series, and were among the first high-performance 3.5-inch drives on the market at their introduction in 1987.