Facebook open sources Time Card, its PCIe-based timekeeping tool that uses atomic clocks and navigation satellites to keep devices and data centers in sync (Stephen Shankland/CNET)

Stephen Shankland / CNET:
Facebook open sources Time Card, its PCIe-based timekeeping tool that uses atomic clocks and navigation satellites to keep devices and data centers in sync  —  The social network giant gives away its hardware and software designs that can keep data centers humming efficiently.