Authority control systems assign a unique identifier to each topic, to allow precise identification of topics, and enable more accurate searches. The entries typically correspond to people, book titles, and similar well-defined entities.
The {{Authority control}} template links Wikipedia articles to the corresponding entries in library catalogs of national libraries and other authority files all over the world. This is why you may see several code numbers listed. As an example, the Wikipedia authority control information for the Alexander Graham Bell article looks like this:
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Student of English and Computer Sciences situated in Berlin,Germany.
Fluent in English & German.
Contributing to wikipedia.org since 12th December 2008.
Current article drafts:
/natural order hypothesis from Stephen Krashen's Monitor Theory
