DDI stands for:

  • Direct Dialing In, see dial
  • The official Italian name of the Istrian Democratic Assembly, a regional party in Croatia
  • Device Driver Interface, interface between (Windows) operating system and device drivers
  • Diverging Diamond Intersection, also DCD, a newer type of a motorway junction ( traffic)
  • Deputy Director of Information, a function within the Central Intelligence Agency
  • Data Documentation Initiative, standard for the description of social science data, metadata model

DdI stands for:

  • Dideoxyinosine, didanosine see
  • Disambiguation
  • Abbreviation