Arcs anyone?

From time to time I come across references to something called arc minutes and
arc seconds. Are these ever used in machining, or CNC? What are they, anyway?

Bill

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RKBA! * Blessings on thee, oh Israel!!! * 4-19!
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An _EFFECTIVE_ | Insured by | All Matter is vibration. | Let he who hath no
weapon in every | by Colt; | --Max Planck | weapon, sell his
hand = Freedom | Dial | In the beginning was the | garment, and buy a
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