Things such as electricity, petroleum and steel. The revolution was possible due to the availability of natural resources (petroleum), strong government, transportation methods, power supplies, and a high amount of laborers.
Specific people involved are Andrew Carnegie who dominated the steel industry and owned J.P Morgan; Alexander Bell who created the telegraph. There's also John D. Rockefeller who greatly influenced the oil industry and Cornelius Vanderbilt who use railroads to connect major cities.
Hope I helped :)
