即時通訊
"Instant messaging in voice": The next development in messaging was in making text messaging real-time, rather than just asynchronous store-and-forward delivery into a mailbox. Although in the 1980s Minitel in France was extremely popular and Teletext was widely used in the US, instant messaging on the Internet began with the ICQ application developed in 1996 as a public Internet-based free text "chat" service for consumers, but soon was being used by business people as well. It introduced the concept of Internet Protocol "presence management" or being able to detect device connectivity to the Internet and contact recipient "availability" status to exchange real-time messages, as well as personalized "Buddy list" directories to allow only people you knew to find out your status and initiate a real-time text messaging exchange with you. Presence and Instant Messaging has since evolved into more than short text messages, but now can include the exchange of data files (documents, pictures) and the escalation of the contact into a voice conversational connection.