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- School buses11
- Sex discrimination against women2
- Shipping2
- Signs and signboards[remove]421
- Silos2
- Sit-down strikes18
- Social conflict84
- Social justice4
- Soft drink industry2
- Spectators2
- Speeches, addresses, etc.4
- Steel castings industry2
- Steel industry and trade6
- Stockholders' meetings6
- Storefronts2
- Street theater6
- Street-railroads12
- Strikes and lockouts122
- Student protesters35