DK can refer to any of the following:
Diskeeper, a disk defragmenter for Microsoft Windows and Open VMS, often abbreviated DK
Donkey Kong , a popular video game character created by Nintendo's Shigeru Miyamoto
The IATA code for MyTravel Airways and Eastland Air
Democratic Kampuchea Cambodia 1975 to 1979
Dead Kennedys, a famous hardcore punk band
The Kingdom of Denmark
.dk, Denmark's country code Top Level Domain
a common Danish initialism for Denmark
Denmark's ISO 3166-1 alpha-2 country code and its subsets
Derek "DK" Kitson, a firefighter from Third Watch played by Derek Kelly.
Diels-Kranz
Donut King, a popular fast food outlet
Dorling Kindersley, a book publisher
DK , the abbreviation for the 2006 debut album by Danity Kane
Darryl Kile, a baseball pitcher
Darren Knott, a British disc jockey and record producer
dk is sometimes mistakenly used as the symbol for the SI prefix deca/deka; the correct symbol is da
An initialism (sometimes written as D.K.) for the Dak
Source:
http://en.wikipedia.org/wiki/DK