NACO is the Name Authority Cooperative program, which coordinates the national authority file for personal, corporate, and conference names, as well as names of geographic locations, works, and expressions. The NACO program is run through PCC (the Program for Cooperative Cataloging). The great thing about NACO is that if your library is willing to support you, any library worker can become NACO trained. And, unlike the subject heading process where the Library of Congress acts as a gatekeeper, NACO contributors directly add to the authority file.
For more information about the NACO program, including information on being trained to create name authority records, visit their website.