[1] Integrated Digital Access - ISDN-Dienst der britischen Post ab 1982 (64B+2x8B)

[2] Intercommunication Data Areas

[3] International Development Association

[4] International Dark-sky Association (http://www.darksky.org/ida/) {Astronomie}

[5] Institute for Defense Analysis

[6] Integrated Digital Avionics (->"IEEE Standard Dictionary")

[7] Intrusion Detection Alarm (->"IEEE Standard Dictionary")

[8] Ionospheric Dispersion Analysis (->"IEEE Standard Dictionary")

[9] Intelligent Disk/Drive Array

[10] Interface DIsplay Assembly (->"NASA Acronym List")

[11] Idaho Falls, ID, USA -internationale Fughafen-Kennung