The Hat reference article from the English Wikipedia on 24-Apr-2004
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Hat

For thoughtful child sponsors
HAT is also the abbreviation for histone acetyltransferase.
This article is part of the
Hats and Headgear series:
Overview of headgear
Hats; Bonnets; Caps
Hoods; Helmets; Wigs
Masks; Veils; Scarves
Tiaras; Crowns
List of hats and headgear

A hat is an item of clothing which is worn on the head – a kind of headgear. Hats often have a brim, and may be either placed on the head, or in the case of some women's hats, secured with hat-pins (which are pushed through the hat and the hair). Depending on the type of hat, they may be worn only by men, women or by either sex.

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See also

The neurologist Oliver Sacks wrote a book entitled The Man Who Mistook His Wife for a Hat.

Michael Nyman later wrote an opera with the same title, based on the case-study which gave that book its name.