In 1971 the first e-mail program was made by Ray Tomlinson that allowed people to send mail electronically. (Hence E-mail)
Steve walker invented a way to add a group of different email addresses at once when before this you had to add each email address one-by-one
1979 was the year when Kevin Mackenzie had the idea to use symbols in communication. Though at the time it was not ideal to use, it has evolved into what it is today
Tim Berners-Lee invented the World Wide Web that let him communicate computer-to-computer.