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How Atomic Clocks Work

Are Atomic Clocks Radioactive? Atomic clocks keep time better than any other clock. They even keep time better than the rotation of the Earth and the movement of the stars. Without atomic clocks, GPS navigation would be impossible, the Internet would not synchronize, and the position of the planets would not be known with enough […]

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How PDAs Work

Types of PDAs Traditional PDAs Today’s traditional PDAs are descendents of the original PalmPilot and Microsoft Handheld PC devices. Palm devices run the Palm OS (operating system), and Microsoft Pocket PCs run Windows Mobile. The differences between the two systems are fewer than in the past. Palm PDAs Most Palm devices are made by palmOne,

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