The correct answer is sending the first email.The American programmer who invented email was Ray Tomilson.He year 1971 for the first time between the two computers 'ARPANET system' on a message .In 2012, he by the Internet Society, the Internet Hall of Fame " was included .Earlier, users could compose messages to others using the same computer.He first had looked for a user to separate from their host symbol rate (@) is used .Additional InformationDouglas Humperdinck was the "computer mouse" in 1960 was invented . Then he made it out of wood.Douglas gave the first demonstration of the mouse at the 1968 Computer Conference in San Francisco .