In 1971 Ray Tomlinson sent the first network email between two machines sitting side by side. He picked the @ symbol to separate user from host.
On 3 December 1992 engineer Neil Papworth sent the first SMS from a computer to a phone on the Vodafone network. Phones could not send texts back yet.
IBM Simon combined a phone, pager, calendar, notepad and email on a touchscreen you tapped with a stylus. Its battery lasted about an hour of talk time.
