Facebook and work are as synonymous as office jobs and solitaire. Sure, not everyone does it, but it's hardly surprising to catch a glance of some employee's news feed left open on a nearby monitor.

LinkedIn is supposed to be a social network for the corporate world, but using that site actually feels like work, and who wants to do more of that while they're taking a break? So Facebook is taking a more serious shot at the issue with "Facebook at Work."

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