Velocity requires analyzing data in near real time.

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One or more wearable motion trackers, connected to a smartphone, deliver real-time 3D joint angles, position and velocity.

ENGADGET: Xsens teases wearable 3D body sensors that won't cost, will track an arm and a leg (video)

There are quite a few people who believe that subsequent enhancements in high velocity trading have not been such a good thing for the real economy.

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After midnight, we will be looking back for real at a long year of Internet froth, a decade of increasing velocity, a century of turmoil (trapped by triumph) and a thousand years where change has been so vast, so profound, that we can scarcely comprehend life Way Back Then.

CNN: ASIANOW - TIME Asia | Culture on Demand: Letter from Cortona