HDI

'HDI' may refer to:

★ Human Development Index, a United Nations statistic

★ Help Desk Institute, a trade association

★ PSA HDi engine, a diesel automobile engine by Peugeot/Citroën

★ Hexamethylene diisocyanate, an organic compound used to make polymers such as polyurethane

★ HDi Interactive Format (formerly ''iHD''), a format for providing interactive menus in HD DVD movies
'See also:'

★ HDI-45 connector, a video connector by Apple Inc.