DDI

DDI may stand for:

Companies and organizations

 * DD International, international TV channel in India
 * Development Dimensions International, a talent management company
 * Direct Democracy Ireland, a political party in Ireland
 * KDDI, formerly DDI, a Japanese telecommunications company
 * Data Disc, Incorporated, a defunct American computer hardware company

Science

 * Drug–drug interaction
 * Didanosine, an antiretroviral drug

Technology

 * Acronym for DNS/DHCP/IPAM; see IP Address Management
 * Direct dial-in, or direct inward dialing, a telecommunications service
 * D&D Insider, an online method used to deliver Dungeons & Dragons content
 * Diverging diamond interchange, a road structure that guides traffic

Other uses

 * Dance Dance Immolation, interactive performance piece
 * Data Documentation Initiative, a standard for describing surveys, questionnaires, and statistical data files
 * Democracy-Dictatorship Index, a binary measure of democracy and dictatorship
 * Divisional detective inspector, a rank in the Criminal Investigation Department of London's police