MDI

MDI may refer to:

Computer science

 * Media Delivery Index, a metric used in IPTV networks
 * Medium-dependent interface (MDI) and medium-dependent interface crossover (MDI-X), types of Ethernet port connections
 * Microsoft Document Imaging Format, a proprietary file format
 * Mission Data Interface, an interface developed by NUWC Keyport
 * Multiple-document interface, a type of software application interface
 * Multi-Draw Indirect, a Rendering technique

Health

 * Major Depression Inventory, a self-report mood inventory developed by the World Health Organization
 * Metered-dose inhaler, a device that helps deliver a specific amount of medication to the lungs
 * Multiple drug intake, an unnatural cause of death
 * Multiple Daily Injections, a technique of intensive insulinotherapy
 * Mental Development Index, a measure of the cognitive abilities of infants and part of the Bayley Scales of Infant Development

Organizations

 * Management Development Institute, a business school in Gurgaon, India
 * Merchants Distributors, Inc., a wholesale grocery store distributor based in Hickory, North Carolina
 * Movement for Democracy and Independence, a former political party in the Central African Republic
 * Motor Development International, a compressed air car maker

Other uses

 * Mount Desert Island, an island off the coast of the U.S. state of Maine
 * Methylene diphenyl diisocyanate, a chemical
 * Michelson Doppler Imager, an instrument on board the SOHO spacecraft
 * 1501, in Roman numerals
 * Medically determinable impairment, a factor in establishing disability under Social Security Disability Insurance and Supplemental Security Income