Dec. 4 (Bloomberg) –- For its 85th anniversary, Bloomberg Businessweek chronicles the most disruptive ideas of the past 85 years. In 1984, the world was introduced to the Apple Macintosh personal computer with an advertisement that ran during Super Bowl XVIII. The spot helped define Apple as a brand and changed the Super Bowl into a must-see media event. (Video by Brandon Lisy. Music by Andy Clausen) (Source: Bloomberg)