[1] Iterated Prisoner's Dilemma (s. Gefangenendilemma)

[2] Image Plane Detector

[3] Individual Package Delivery

[4] Information Processing Division

[5] Insertion Phase Delay

[6] Instructional Program Development

[7] Integrated Pin Diode

[8] Integrated Powerhead Demonstration

[9] Integrated Product Development

[10] Isotope-Powered Device

[11] Imaging Photon Detector {Astronomie}

[12] Interplanetary Dust {Astronomie}