IAD may stand for :

• Iraqi Army Division
• Institut des Arts de Diffusion (Institute of Media Arts), a high school of arts based in Brussels, Belgium
• Internal affairs (law enforcement), the part of a police agency that investigates possible misconduct
• Inter-American Dialogue, a non-profit organization in Washington DC
• Internal Auditing Department of the WBG
• International Automotive Design, a British car manufacturer

iAd is a mobile advertising platform developed by Apple Inc. for its iPhone, iPod Touch, and iPad line of mobile devices allowing third-party developers to directly embed advertisements into their applications. Announced on April 8, 2010, iAd is part of Apple's iOS 4, originally stated for release on June 21, 2010, the actual date change to July 1, 2010 was announced at Apple's June 7, 2010 keynote, with an iPad version appearing in the fall. Hosted and sold by Apple, the iAd platform is expected to compete with Google's AdMob mobile advertising service.