Meet Matrix, an Open Standard for De-centralized Encrypted Communications
In the early days of the internet, communication was by email. Originally siloed by companies like Compuserve, AT&T and Sprint so that messages could only be exchanged with others on the same system, email is now ubiquitous. Pretty much anyone can communicate with anyone else without worrying about app or device or browser.
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Story added 23. November 2016, content source with full text you can find at link above.