Oh

OHC
Abbreviation of Overhead Cam.
Ohm
Defined as the resistance of a conductor through which a current of one ampere is flowing when the potential difference across it is one volt.
Ohm, Georg Simon
German physicist noted for his contributions to mathematics, acoustics, and the measurement of electrical resistance.
Ohm Metre
A unit of resistivity, measuring the extent to which a substance offers resistance to passage of an electric current.
Ohmmeter
Device used to measure electrical resistance.
Ohms per Square
The resistance of any square area of thin film resistive material as measured between two parallel sides.
OHV
Abbreviation of Overhead Valve.