Mistakes That Made America: Play-Doh

On October 29, 1969, Stanford programmer Bill Duvall sent a single-word message—"login"—to UCLA student programmer Charley Kline, 350 miles away. Transmitted between two computers that each filled an entire room, this message marked the first communication between networked computers and is widely regarded as the birth of the internet.

Grace Hopper, pioneer of computer science, lived in Virginia later in life and is buried at Arlington National Cemetery.

Hollywood actress Hedy Lamarr is remembered for more than her acting—she invented a signal-hopping technology used in Wi-Fi.

A failed attempt to create a super-strong adhesive accidentally results in a weak, reusable one—leading to the unlikely invention of the Post-it Note, which goes on to become one of the world’s most recognizable tools for work and creativity.