DSN may refer to:
Technology Computing & Internet Data set (IBM mainframe) Name, the name of a computer file having a record organization Data source name, a data structure used to describe a connection to a data source Delivery Status Notification message, an automated electronic mail message about a delivery problem Distributed social network, a social network that is decentralised and distributed across multiple providers International Conference on Dependable Systems and Networks .DSN (design file), industry-standard import file format of Specctra-compatible autorouters
Military and Intelligence Defense Switched Network, a communications network operated by the United States Department of Defense DSN DASH, the U.S. Navy's Drone Anti-Submarine Helicopter. DSN Satellite Network, a Japanese military X band satellite communications network operated by DSN Corporation Directorate State Protection and Intelligence Service (), an Austrian intelligence agency
Space Deep Space Network, a communication network
Media and entertainment Direct Sports Network, a sports centered digital media company, based in Irvine, California Daily Silksong News, a YouTube channel covering news about Hollow Knight: Silksong
Others Dansk Sprognævn, the Danish Language Council Deutsche Schulen Nigeria, a school system which includes the Deutsche Schule Abuja IATA code for Ordos Ejin Horo Airport, China Star Trek: Deep Space Nine, a science fiction television program Doctor of Science in Nursing