ational adio stronomy bservatory: The U.S. national radio astronomy facility, managed by Associated Universities Inc., a university consortium, under a co-operative agreement with the National Science Foundation. The NRAO operates the GBT, VLA, VLBA and several smaller radio telescopes. For details, consult the NRAO Home Page at http://www.nrao.edu

National Radio Astronomy Observatory; headquartered in Charlottesville, VA with sites in WV ( Green Bank), NM ( Socorro), and AZ ( Tucson/Kitt Peak Mtn.)