IAD may stand for:
Organisations and businesses
- Iraqi Army Division
- Internal affairs (law enforcement), the part of a police agency that investigates possible misconduct
- Inter-American Dialogue, a non-profit organization in Washington DC
- International Automotive Design, a British car manufacturer
- The ICAO airline code for AirAsia India
Places, Airport codes
- Iad, the former name of Livezile Commune, BistriÅ£a-NÄsÄud County, Romania
- Washington Dulles International Airport, IATA airport code
Software, Information Technology, Robotics, Techniques
- iAd, a mobile advertising service operated by Apple Inc.
- Integrated access device
- Internet addiction disorder
- Intelligent Assist Device (robotics)
Science
- Intramolecular aglycon delivery, a stereospecific glycosylation technique in organic carbohydrate chemistry
Social science
- Institutional analysis and development framework, a systematic method in policy analysis
Other
- Instructor-assisted deployment, a parachute deployment method for student skydivers.
- Interaction design
- International Air Distress radio frequency