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2007: The Open Handset Alliance, which includes Google and numerous hardware vendors, announces Android, arguably the most popular
2008: The New York Stock Exchange, soon to be followed by many of the other major stock exchanges of the world, switches to Linux for its core operating system. Linux isn't becoming big business. Linux is big business.
2011: IBM's Watson computers, running Linux, wins at Jeopardy and sets a new standard for expert systems.