Authority control is the practice of creating and maintaining index terms for bibliographic material in a catalog in library and information science. Authority control fulfills two important functions. First, it enables catalogers to disambiguate items with similar or identical headings. For example, two authors who happen to have published under the same name can be distinguished from each other by adding middle initials, birth and/or death (or flourished, if these are unknown) dates, or a descriptive epithet to the heading of one (or both) authors. Second, authority control is used by catalogers to collocate materials that logically belong together, although they present themselves differently. For example, authority records are used to establish uniform titles, which can collocate all versions of a given work together even when they are issued under different titles.

Although theoretically any piece of information on a given book is amenable to authority control, catalogers typically focus on authors and titles. Subject headings fulfill a function similar to authority records, although they are usually considered separately.

Andrew Paolo Napolitano (born June 6, 1950) is a former New Jersey Superior Court Judge. He is a political and senior judicial analyst for Fox News Channel, commenting on legal news and trials. Napolitano started on the channel in 1998.

Napolitano was born in Newark, New Jersey. He is a graduate of Princeton University (he was a founding member of the Concerned Alumni of Princeton) and Notre Dame Law School. Napolitano sat on the New Jersey bench from 1987 to 1995, becoming the state's youngest then-sitting Superior Court judge. He also served as an adjunct professor at Seton Hall University School of Law for 11 years. Napolitano resigned his judgeship in 1995 to pursue his writing and television career.

Prior to joining Fox as a news analyst, Napolitano was the presiding judge on the television show, Power of Attorney, in which people brought small-claims disputes to a televised courtroom. Differing from similar formats, the plaintiffs and defendants were represented "pro bono" by famous attorneys. The show ran in syndication during the 2000–2001 season.