MID

MID or Mid may refer to:

Computers and electronics

 * MapInfo Interchange Format; .mid is also sometimes used as the filename extension for some MapInfo files
 * Media Identification Code (MID code), a code indicating the manufacturer of a DVD
 * Mobile Internet device, a category of mobile computer
 * Molded interconnect device, an injection molded thermoplastic part with integrated electronic circuit traces
 * Multiple interface declaration, a construct in some computer programming languages
 * Musical Instrument Digital Interface, .mid is sometimes used as an alternate filename extension for MIDI files

Medicine and biology

 * Multi-infarct dementia, a disease also known as vascular dementia
 * Minimal important difference, the smallest improvement felt to be meaningful by a patient
 * Monocyte, a type of white blood cell in the innate immune system of vertebrates

Military

 * Maritime identification digits, a 3-digit code identifying the country of a ship/coastal station using communication equipment.
 * Mentioned in dispatches, a military award for gallantry or otherwise commendable service
 * Militarized interstate dispute, conflicts between states that do not involve full-scale wars
 * Military Intelligence Division (United States), a former military intelligence branch of the United States Army

Organizations

 * Integration and Development Movement, a political party in Argentina
 * Ministry of Foreign Affairs (Russia), for which MID is a colloquial term
 * Monastic Interreligious Dialogue, the American arm of the DIMMID, an interfaith movement

Other

 * Mérida International Airport (IATA: MID)
 * Middletown station (Pennsylvania) (Amtrak station code: MID)
 * Modesto Irrigation District, a special district in California
 * Mortgage interest deduction, a tax deduction for mortgage interest paid by homeowners
 * Measuring Instruments Directive
 * Mid vowel
 * Midfielder, a position in association football