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Milliseconds (msec) = 1/1000 of a second
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Microseconds (μsec) = 1/1,000,000 of a second
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Nanosecond (nsec) = 1/1,000,000,000 of a second
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Milliamp (mA) = 1/1000 of an ampere
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Microamp (μA) = 1/1,000,000 of an ampere
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Angstrom (Å) = 1/10,000,000,000 of a meter
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Nanometer (nm) = 1/1,000,000,000 of a meter
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Hertz (Hz) = 1 cycle per second
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Kilohertz (KHz) = 1000 cycles per second
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Megahertz (MHz) = 1,000,000 cycles per second