Presence

(1) The ability to detect the electronic presence of other users who are connected to the Internet, through a PC or mobile device, and whether they are available in real time. Presence services are commonly provided through applications like Finger, SMS, instant messaging clients, and discussion forums, although a number of companies are developing products in other areas that leverage presence, such as VoIP.

(2) The term Web presence refers to an individual or business having an established existence on the World Wide Web, through a Web site, e-mail, Internet advertising, blog, or a collection of Web files. Web presence is also called Internet presence.

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