Is "slacks" the worst word in the English language? The New Yorker thinks so. Hollywood producer Robert Evans might disagree. He poses here with some of his most fashionable slacks in 1957. Marty Lederhandler/AP hide caption

itoggle caption Marty Lederhandler/AP

A cyclist uses a fader to manipulate music, on Cogoo's Turntable Rider kit that blends DJ and BMX culture. NPR hide caption

itoggle caption NPR

Musician Lois Kendall plays the bass while the robot Elektro "conducts" on stage as part of a Westinghouse Electric and Manufacturing demonstration at the 1939 World's Fair in New York. Hulton Archive/Getty Images hide caption

itoggle caption Hulton Archive/Getty Images