Ic
- -ić
- CSS
- Canary Islands
- Christogram
- IC Bus
- IC codes
- IC50
- IUPAC nomenclature of inorganic chemistry
- Ice Ic
- Identity document
- Illinois Central Railroad
- Illinois College
- Imperial College London
- Impuls IC
- Incident commander
- Independent contractor
- Index Catalogue
- Index of coincidence
- Indian Airlines
- Indifference curve
- Industry Canada
- Inferior colliculus
- Infinite Craft
- Information coefficient
- Informed consent
- Ingobamakhosi Carbineers
- Integrated circuit
- Intensive care medicine
- InterCity
- InterContinental
- Interactive C
- Interchange (road)
- Interchangeable core
- Intercités
- Interconnection
- Intermittent catheterisation
- Internal control
- International Canoe
- International College, Beirut
- Interstitial cystitis
- Intimacy coordinator
- Ion chromatography
- Ionization chamber
- Irish Cup
- Iron Cross (Burmese band)
- Irreducible complexity
- Isolation condenser
- Ithaca College
- Management
- Old English pronoun
- Rosminians
- Type Ic supernova
- United States Intelligence Community