Then came e-mail a few years later, a core communications protocol called TCP/IP in the late 70s, the domain name system in the 80s and the World Wide Web - now the second most popular application behind e-mail - in 1990.

• 几年之后,电子邮件出现了,这是在70年代晚期被称为tcp/IP的核心通信协议。80年代出现了域名系统,1990年,万维网问世,并成为仅次于电子邮件的最流行的应用工具。