A great change was brought about by movement becoming mechanized, by the use of steam, petroleum and electricity. In the pre-industrial period, Greece moved at a very slow pace. The Greeks of the diaspora were the pioneers and innovators. Greeks distinguished themselves in building and shipbuilding. Steel and concrete are predominant in the late 19th and early 20th century. Sweeping changes occur. Traditional ways of production are not recorded or published. Nevertheless, the triumph of technology led to the creation of museums of Science and Technology related to the field of Industrial Archaeology.