Engelbart also played a huge role in the development of hypertext and precursors of GUIs. On 9th December 1968, in San Francisco, he gave what is fondly known as the Mother of All Demos. It featured several popular technologies which we use today including GUI, word processing, video conferencing and more.
Ray Tomlinson, the inventor of the email system, did not invent the @ sign. It had been in existence for hundreds of years. He just used it in an email address and made it popular once again. [more...]