- Oct 1 Cincinnati Enquirer publishes first report on Baseball's reserve clause; rights to players retained by team upon the contract's expiration; replaced by free agency
- Oct 7 Germany & Austrian-Hungary sign Twofold Covenant
- Oct 8 War of the Pacific: the Chilean Navy defeats the Peruvian Navy in the Battle of Angamos, Peruvian Admiral Miguel Grau is killed in the encounter.
Edison Perfects Light Bulb
Oct 22 Thomas Edison perfects carbonized cotton filament light bulb
Admirals
Aviators
Gangsters
Generals
Industrialists
Suffragists