IIH

• Idiopathic intracranial hypertension
• Innovations in International Health, an innovation platform that facilitates multidisciplinary research to develop medical technologies for developing world settings
• Transcription factor II H
• Instituto de Investigaciones Históricas (Institute of Historical research), a research institute of the National Autonomous University of Mexico
• Indian Institute of HAM

Routers use  Intermediate System - Intermediate System  Hellos (IIH) for establishing and maintaining adjacencies between  Intermediate System's