The U.S. Copyright Office is recognizing the 50th anniversary of the treatise "Nimmer on Copyright" by hosting a program on May 6, 2013. "nimmer" is the most cited work in the field and the undisputed leading authority for in-depth, comprehensive analysis of U.S. copyright law. The program will feature David Nimmer of UCLA School of Law who will discuss his own role with respect to the treatise, as well as that of his father, the late Melville Nimmer. Scholars Robert Brauneis of The George Washington University Law School and Peter Menell of Berkeley School of Law will also speak, as will Jon Baumgarten, former general counsel in the Copyright Office, and Shira Perlmutter, Chief Policy Officer at the U.S. Patent and Trademark Office. Karyn Temple Claggett, Associate Register of Copyrights for Policy and International Affairs, will moderate the discussion. The panel of experts will offer insights and observations about the treatise, including its effect on both the theory and practice of copyright law.