Encyclopedias, Almanacs, Transcripts, and Maps
- Internal Improvements
- Internal Improvements Acts
- Internal Revenue Act of 1954
- International Brigades
- International Confederation of Free Trade Unions
- International Conference on Arab Trade Unions
- International Criminal Court
- International Emergency Economic Powers Act (1977)
- International Federation of Miners
- International Federation of Trade Unions
- International Labor Union
- International Labour Organization
- International Peace and Security
- International Relations of the Anglophone Caribbean
- International Trade in the Pre-Modern Period, Middle East
- International Transport Workers' Federation
- Internet and the Economy (Issue)
- Internet Revolution
- Internment of Enemy Aliens
- Interracial Sex