In 1978, Ayyadurai created a computer programme, which he called "email," that replicated all the functions of the interoffice mail system: Inbox, Outbox, Folders, Memo, Attachments, Address Book, etc.
These features are now familiar parts of every email system. On August 30, 1982, the US government officially recognised Ayyadurai as the inventor of email by awarding him the first US Copyright for Email for his 1978 invention.
At that time copyright was the only way to protect software inventions. Email wasn't created, with a massive research budget, in big institutions like the ARPANET, MIT or the military.
Such institutions had thought it "impossible" to create such a system, believing it far too complex, Huffington Post said.
Ayyadurai was born to a Tamil Family in Bombay.