So in February 2008, he all but stopped sending e-mail. He didn’t wipe out his inbox. In fact, he still checks e-mail daily — it takes him about two minutes per day; most messages are internal meeting notifications — and he still uses it for sensitive one-on-one conversations. But for the most part, when people write him, he answers via social media and suggests that they’d be better off chatting via Twitter, Google+, or on Connections, IBM’s internal social network. The idea is that if more of his communication is in the open, he’ll spend less time communicating.