- Hazardous substances1
- Imprisonment1
- Independent contractors--Legal status, laws, etc.1
- Industrial safety1
- Inflation (Finance)1
- Infrastructure (Economics)1
- International Brotherhood of Carpenters1
- International Brotherhood of Teamsters1
- International Brotherhood of Teamsters, Chauffeurs, Warehousemen, and Helpers of America1
- International Ladies' Garment Workers' Union. Local 122 (Atlanta. Ga.)1
- International Union of Painters and Allied Trades1
- International Union, United Automobile, Aircraft, and Agricultural Implement Workers of America1
- International labor activities1
- Ireland--History--Famine, 1845-18521
- Iron and steel workers--Labor unions1
- Janitors1
- Jargon (Terminology)1
- Job enrichment1
- Job satisfaction1
- Korean War, 1950-19531
