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Telegram has various client apps, some developed by Telegram Messenger LLP and some by the community. Most of them are free and open-source and released under the GNU General Public Licence version 2 or 3. The official clients support sending any file format extensions.
Examples of such messaging services include: Skype, Facebook Messenger, Google Hangouts (subsequently Google Chat), Telegram, ICQ, Element, Slack, Discord, etc. Users have more options as usernames or email addresses can be used as user identifiers, besides phone numbers. Unlike the phone-based model, user accounts on a multi-device model are ...
ICQ was among the first stand-alone instant messenger (IM) applications—while real-time chat was not in itself new (Internet Relay Chat [IRC] being the most common platform at the time), the concept of a fully centralized service with individual user accounts focused on one-on-one conversations set the blueprint for later instant messaging ...
Skype allows these registered users to communicate through both instant messaging and voice chat. Voice chat allows telephone calls between pairs of users and conference calling and uses proprietary audio codec. Skype's text chat client allows group chats, emoticons, storing chat history, and editing of previous messages. Offline messages were ...
On this day in 1911 the first telegram was sent around the world via a commercial service from the New York Times' office to test how fast a message could travel through a dedicated cable.
KDE Telepathy (sometimes abbreviated as KTp) was an instant messaging (IM) client which supported text-, voice-and video-based communication as well as file transfers over various IM protocols.
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Yahoo! Messenger added video capabilities in 2001; [32] by 2005, such features were built-in also in AIM, MSN Messenger, and Skype. [33] There were a reported 100 million users of instant messaging in 2001. [34] As of 2003, AIM was the globally most popular instant messenger with 195 million users and exchanges of 1.6 billion messages daily. [2]