![]() ![]() Not like emails for example that float freely between domains, servers and vendor technologies. AOL, MSN, ICQ, Facebook, Skype, Twitter – many different largely closed networks within in which users can interact in char-style. Google Talk (now assimilated into GMail and Google Hangouts) started as a relatively open service (based on the XMPP standard for IM), but is now largely proprietary. ![]() Whatsapp is perhaps the most popular chat-like service, but it lives on its own. Unfortunately, there is has been an explosion in the number of IM protocols and services, many of which cannot talk to each other. Chatting or instant messaging is a valuable for of communication, somewhere between email (very asynchronous) and telephone/Skype/VoiP/HangOut (synchronous) and quite similar to SMS.
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