Introduced in 1971, the microprocessor is basically the fundamental driving force and brain of all of the digital equipment we use today -- from iPhones and computers to notebooks and tablets.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.
A biography of the 41st U.S. president, from his service in World War II to his days in the Oval Office. Part of the award-winning Presidents collection.
A new religion called spiritualism affected the nation in the era of Abraham Lincoln, P. T. Barnum and Frederick Douglass.
The life of the president who saw himself as the heroic defender of the "shining city on a hill." Part of the award-winning Presidents collection.
Between 1890 and 1920, 12 million people emigrated from Europe arriving in New York Harbor and Ellis Island.
Robert E. Lee, the leading Confederate general of the American Civil War, remains a source of fascination and, for some, veneration.
Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
The internationally famous carnival of delights in New York was the birthplace of the hot dog and the roller coaster.