What does DDN stand for?

What does DDN mean?

DDN	Delta Downs, Queensland, Australia Regional » Airport Codes
DDN	Dynamex, Inc. Business » AMEX Symbols
DDN	Don't Do Nothing Miscellaneous » Funnies
DDN	Defense Data Network Computing » General
DDN	De Divinus Nominibus International » Latin
DDN	Defense Data Network Academic & Science » Meteorology
DDN	Defense Data Network Governmental » Military
DDN	Don't Do Nothing Governmental » Military
DDN	Data Delivery Notice Governmental » NASA
DDN	Digital Data Network Computing » Networking
DDN	Digital Dakota Network Miscellaneous » Unclassified
DDN	Distributes Dynamic Network Miscellaneous » Unclassified
DDN	Defense Dept Network Miscellaneous » Unclassified
DDN	Design Drafting Numerical Miscellaneous » Unclassified
DDN	Dayton Daily News Miscellaneous » Unclassified
DDN	Debbie Dean News Miscellaneous » Unclassified
DDN	Data Defense Network Miscellaneous » Unclassified