Multiple display electronic caliper

1. An apparatus comprising:

a caliper configured to measure at least one physical dimension; and

a display configured to present:

a first representation and a second representation of the at least one physical dimension measured by the caliper, wherein a format of the first representation is different from a format of the second representation, and the first representation is simultaneously displayed with the second representation; and

an approximate difference between the first representation and the second representation.

2. The apparatus of claim 1 , wherein the first format has metric units and the second format has U.S. units.

3. The apparatus of claim 1 , wherein the resolution of the first representation is selectable.

4. The apparatus of claim 1 , wherein the format of the first representation includes a first measurement unit and the format of the second representation includes a second measurement unit that is different from the first measurement unit.

5. The apparatus of claim 1 , further comprising:

an electronics package that includes the display.

6. The apparatus of claim 1 , wherein the display includes a unit indicator.

7. The apparatus of claim 1 , wherein the display includes a variance indicator.

8. The apparatus of claim 1 , wherein the format of the first representation includes one of a decimal format and a fractional format.

9. The apparatus of claim 8 , wherein the format of the second representation includes one of a decimal format and a fractional format, and is different from the format of the first representation.

10. The apparatus of claim 1 , further comprising:

an electronics package configured to provide data representative of the first representation and the second representation to an external display module.

11. The apparatus of claim 10 , wherein a hardwire connection provides the data from the electronics package to the external display module.

12. The apparatus of claim 10 , wherein a wireless connection provides the data from the electronics package to the external display module.

13. A method comprising:

simultaneously displaying on a display of a caliper, a first representation and a second representation of a measurement provided by the caliper, wherein a format of the first representation is different from a format of the second representation, and

displaying, on the display of the caliper, an approximate difference between the first representation and the second representation.

14. The method of claim 13 , further comprising:

providing data that represents the first representation and the second representation to an external display module.

15. The method of claim 13 , wherein the format of the first representation includes one of a decimal format and a fractional format.

16. The method of claim 13 , wherein the first format has metric units and the second format has U.S. units.

17. A computer program product, encoded on a non-transitory computer-readable medium, operable to cause a data processing apparatus to perform operations comprising:

simultaneously displaying on a display of a caliper, a first representation and a second representation of a measurement provided by the caliper, wherein a format of the first representation is different from the format of the second representation,

wherein the display is configured to present an approximate difference between the first representation and the second representation.

18. The computer program product of claim 17 , further operable to cause the data processing apparatus to perform operations comprising:

providing data that represents the first representation and the second representation to an external di splay module.

19. The computer program product of claim 17 , wherein the format of the first representation includes one of a decimal format and a fractional format.

20. The computer program product of claim 17 , wherein the first format has metric units and the second format has U.S. units.