Western Digital Corporation (WD) designs, develops, manufactures and sells hard drives. The Company sells its products worldwide to original equipment manufacturers (OEMs) and original design manufacturers (ODMs) for use in computer systems, subsystems or consumer electronics (CE) devices, and to distributors, resellers and retailers. Its hard drives are used in desktop computers, notebook computers, and enterprise applications, such as servers, workstations, network attached storage, storage area networks and video surveillance equipment. Additionally, its hard drives are used in CE applications, such as digital video recorders (DVRs), and satellite and cable set-top boxes (STBs). WD also sells its hard drives as stand-alone storage products and integrates them into finished enclosures, embedding application software and offering the products as WD-branded external storage appliances. On March 27, 2009, it completed the acquisition of SiliconSystems, Inc.