Built by Douglas Engelbart in 1964, the world’s first computer mouse consisted of two gear-wheels positioned perpendicular to each other, allowing movement on one axis. Douglas received a patent for the “X-Y Position Indicator for a Display System” in 1970. (Thanks, David P)

Built by Douglas Engelbart in 1964, the world’s first computer mouse consisted of two gear-wheels positioned perpendicular to each other, allowing movement on one axis. Douglas received a patent for the “X-Y Position Indicator for a Display System” in 1970. (Thanks, David P)