Information lies at the centre of almost every museum activity. Documentation, in one form or another, is the means for structuring, controlling and making available that information. It may involve ledgers and card indexes, and computers which are often appropriate tools for handling certain types of documentation. In addition to describing a museum’s collections, documentation may include many kinds of related information. This may be general information which relates to the outside world (biographies, genealogies, lists of archaeological or other sites), or it may be information which is useful for the management of the museum’s collections (locations of objects, conservation reports, photographic negative numbers, etc.).