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2. Least count - Wikipedia

   en.wikipedia.org/wiki/Least_Count

   In the science of measurement, the least count of a measuring instrument is the smallest value in the measured quantity that can be resolved on the instrument's scale. [1] The least count is related to the precision of an instrument; an instrument that can measure smaller changes in a value relative to another instrument, has a smaller "least ...

3. Vernier scale - Wikipedia

   en.wikipedia.org/wiki/Vernier_scale

   Vernier caliper scales; main at top, vernier at bottom. It reads 3.58 ± 0.02 mm by adding 3.00 mm (left red mark) on the fixed main scale to vernier 0.58 mm (right red mark). The main scale reading is that to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned lines between the two scales.

4. Calipers - Wikipedia

   en.wikipedia.org/wiki/Calipers

   This would be a simply calibrated caliper, but the addition of a vernier scale allows more accurate interpolation and is the universal practice; this is the vernier caliper. Vernier, dial, and digital calipers can measure internal dimensions (using the uppermost jaws in the picture at right), external dimensions using the pictured lower jaws ...

5. Bore gauge - Wikipedia

   en.wikipedia.org/wiki/Bore_gauge

   A dial bore gauge is a comparative instrument similar to a telescoping gauge, but includes a digital or analog readout. The dial bore gauge must be set to the nominal value of the bore, and it will measure the variation and direction of the bore from nominal. There are multiple ways to set this gauges to the nominal value.

6. Micrometer (device) - Wikipedia

   en.wikipedia.org/wiki/Micrometer_(device)

   Vernier micrometer reading 5.783 ± 0.001 mm, comprising 5.5 mm on main screw lead scale, 0.28 mm on screw rotation scale, and 0.003 mm added from vernier. Some micrometers are provided with a vernier scale on the sleeve in addition to the regular graduations. These permit measurements within 0.001 millimetre to be made on metric micrometers ...

7. HIV isn't the death sentence it once was: How related deaths ...

   www.aol.com/hiv-isnt-death-sentence-once...

   More than 1 million Americans live with human immunodeficiency virus, or HIV, with tens of thousands of new diagnoses each year. But with earlier diagnoses and advances in treatment, HIV, the ...