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- Infection Pharmacology
- Infection, Veterinary, and Ecological Sciences, Institute of
- Infectious diseases
- Institute for Risk and Uncertainty
- Institute of Popular Music
- Insurance
- Integrated Clinical Academic Training
- Intellectual Property
- International Criminological Research Unit
- International Development Office
- International Law and Human Rights Unit
- International Recruitment and Admissions
- International Summer School
- International Support
- Irish Studies, Institute of
- IT Services