Head
Water
Differential of pressure causing flow in a fluid system, usually expressed in terms of the height of a liquid column that pressure will support. The difference in number of feet between two water surface elevations. Height of water above a specified point. The back-pressure against a pump. The vertical distance between two points in a fluid. The vertical distance that would statically result from the velocity of a moving fluid.
The difference between the pool height and tailwater height. Usually expressed in feet of head, or in lbs./sq. inch.
- — Service Hydrologist Reference Manual Glossary of Hydrologic Terms retrieved 2014-06-01
Real Estate
The upper horizontal part of a window frame or window opening.
- — LPC Glossary retrieved 2014-05-29
E-Discovery
Each platter on a hard drive contains a head for each side of the platter. The heads are devices which ride very closely to the surface of the platter and allow information to be read from and written to the platter.
Energy
Renewable Energy
The vertical distance water drops from the highest level to the level of the receiving body of water.
- — ODOE Glossary of Energy Terms retrieved 2014-06-15
Weather
In hydrologic terms, the difference between the pool height and tailwater height. Usually expressed in feet of head, or in lbs./sq. inch
Storage
The filer chassis that contains the motherboard.
Telecommunications
A device that reads, writes, and/or erases data on a storage medium.