title: MDD
text: # MDD
  
  MDD may refer to:
  
  * Major depressive disorder, a mental disorder involving persistent low mood, low self-esteem and loss of interest. It is also known as clinical depression.
  * Mate-Demate Device, a specialized crane used to piggyback the Space Shuttle onto an airplane
  * Medical Devices Directive
  * Midland Airpark (IATA: MDD), a public use airport in Midland, Texas
  * Mine detection dogs
  * Ministry of Defence (Italy), known natively as Ministero della Difesa
  * Mirrored Drive Door, a case design for the Power Mac G4
  * Model-driven development, a software engineering discipline
  