DWAN

 is the prefix used to indicate that a story comes from a Doctor Who annual, published in association with either the BBC or BBC Wales version of Doctor Who.

Other related prefixes are:
 * DWS — for works from Doctor Who Storybooks, like Doctor Who Storybook 2007
 * DWY — for works from the Doctor Who Yearbooks, like Doctor Who Yearbook 1992
 * DAN - for works from the Dalek annuals, like Terry Nation's Dalek Annual 1976
 * K9AN — for works from K9 Annual 1983 (and any annuals which may eventually arise from K9)