Discovers & inventors / Daniel J. Boorstin -- The power of steam / Margaret Sedeen - The age of electricity / Stephen S. Hall -- On wheels & wings / Tom D. Crouch -- A world of new materials / Robert Friedel -- Capturing the image / Thomas B. Allen -- Messages by wireless / Fred Strebeigh -- Power particles / Richard Rhodes -- Computers & chips / T.R. Reid -- Engineering life / H. Garrett DeYoung -- Technology of tomorrow / Carole Douglis.