XDU meaning in Computing ?

The National Conference Center (The National) is a corporate training facility in Leesburg, Virginia. It hosts over 14,000 individuals per month and comprises 265,000 square feet (24,600 m2) of meeting space. The center contains 250 conference rooms, an athletic facility, and 917 guest rooms.

The building was built in 1974 as the Xerox Conference Center at a cost of $55 million. It was designed to assist in copier and technology training for company employees. It was designed by Vincent G. Kling & Partners, and is currently managed by NCC EE, LLC. In 1994 Xerox permitted outside organizations to use the grounds. The center was sold to Oxford Capital Partners in 2000. Two years later, the center completed a $29 million renovation, in order to ameliorate its training operations. The current design implements "living learning modules", a series of color-coded buildings, tunnels, a ballroom, and walking trails.