Wet/Dry Differential: A differential pressure transducer or transmitter that uses a metal diaphragm at the wet port where fluids can be applied, and no diaphragm at the dry port. The dry port exposes the internal circuitry to the medium, so only clean dry gas can be applied to this port.

Wet/Wet Differential: A differential pressure transducer or transmitter that has a metal diaphragm in each pressure port to permit fluid into both parts.

Wetted Parts: The diaphragm and pressure port material that comes in direct contact with the medium (gas, liquid).

Wheatstone Bridge: A network of four resistances, an emf source, and a galvanometer connected such that when the four resistances are matched, the galvanometer will show a zero deflection or "null" reading.

WHOIS: An Internet program which allows users to query a database of people and other Internet entities.

Window: In computer graphics, a defined area in a system not bounded by any limits; unlimited "space" in graphics.

Word: Number of bits treated as a single unit by the CPU. In an 8-bit machine, the word length is 8 bits; in a sixteen bit machine, it is 16 bits.

Working Standard: A standard of unit measurement calibrated from either a primary or secondary standard which is used to calibrate other devices or make comparison measurements.

Write: To record data in a storage device or on a data medium.

WWW: World Wide Web.

WYSIWYG: What You See Is What You Get.