Definition:
~ accelerometers are devices which, in their most sensitive versions, measure forces applied to them with relative precision
~ ranging from one ten-thousandth to one hundred-thousandth (of earth's force of gravity) and fidelity around ten times greater
~ although such precision may appear impressive, it is far from technological performance required by gyroscopes,
~ which are far more difficult to design and manufacture
~ performance/cost ratios ratio may range from 10-2g for flight control

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