Electronic Definitions (O)

[O] Presenting a list of electronic terms starting with letter o that are available for more detailed lookup for their definitions or abbreviation explanation. All terms are listed in alphabetical order for easy browsing.

Electronic Acronyms and Terms For [O]	Description	Other Electronic Terms Somewhat Related;
OA	"Office Automation"	oaa
OAA	"Over Air Addressing"
Object Program	- Is the translated version of a program that has been assembled or compiled
OCR	"Optical Character Recognition" - Is machine recognition of stylised characters by light sensing methods
OCS	"Officer Candidate School"
Octal Notation	- Is the system using base eight and the digits 0 1 2 7
Octave	- A factor of 2. Often used with frequency ratios of 2, as in an octave of frequency referring to a 2:1 change in frequency.
Odd Parity	- Is present in any binary representation in which the number of Is in the representation is odd	parity bit, parity check
OEM	"Original Equipment Manufacturer"
Off Hook	- The condition which nowadays indicates the active state of the local loop
Off Line Processing	- Is processing carried out by devices not under the control of the central processor
Offset Fed Antenna	- An antenna with a reflector that forms only part of a paraboloid of revolution usually excluding the pole or apex such that a front feed causes no aperture blockage
Offset Stepping	- Staggering of circuit traces or via hole pads
OHD	"On Hook Dialing" - Allows numbers to be dialled without lifting the handset
Ohmic Region	- The part of the drain curves that starts at the origin and ends at the proportional pinchoff voltage	pinchoff voltage, proportional pinchof voltage, proportional pinchoff voltage
Ohm`s Law	- Mathematical relationship between current, voltage and resistance stating that when a voltage is applied to a metal conductor, the current moving through the conductor is proportional to the applied voltage.
OIRT	"Organisation International de Radiodiffusion et Television"
OKI	- Oki Electric Industry Co., Ltd., commonly referred to as OKI, OKI Electric or the OKI Group, is a Japanese company manufacturing and selling info-telecom and printer products.
OMT	"OrthogonalMode Transducer"	head unit
On Hook	- The condition which indicates the inactive state of the local loop	on hook dialing
On Line Processing	- Is processing performed on equipment directly under the control of the central processor whilst the user remains in communication with the computer.
OOK	"OnOff Keying"
Op Amp	- A high gain dc amplifier that provides usable voltage gain for frequencies from 0 to over 1 MHz	linear op amp circuit
Open	- Refers to a component or connecting wire that has an open circuit, equivalent to a high resistance approaching infinity	open subroutine
Open Subroutine	- Is one that is part of the main program and is copied into the program where required
Operation Code	- Is the part specifying the operation to be performed
Operator`s Console	- Is an input/output device that consists of a keyboard and a VDU (or in some cases switches and display lamps). It is used by the operator to control the computer.)
OPL	"Organiser Programming Language" - Used in the Symbian platform for rapid application development	OPX OXH
Optical Mark Reader	- Is an input device that reads marks made in predetermined positions on special forms (or cards) by a light sensing method
Optimum Q Point	- The point where the ac load line has equal maximum signal swings on both half-cycles
Optocoupler	- A combination of a LED and a photodiode. An input signal to the LED is converted to varying light which is detected by the photodiode. The advantage is very high isolation resistance between the input and output.
OPX	- An OPL extension DLL providing language extension procedures	OXH
Orthogonal	- Mutually at right angles	802.11a, cofdm, polarisation, polarisation rotor/rotator x/y
OS	"Operating System" - Is a program or suite of programs that controls the entire operation of the computer handling I/O operations interrupts user requests etc.	oscillations, osi
Oscillations	- The death of an amplifier. When an amplifier has positive feedback, it may break into oscillations, which is unwanted high-frequency signal.	compensating capacitor, ground loop
OSI	"Open Systems Interconnection"	intapnet
OTP	"One Time Programmable"
OTS	"Orbital Test Satellite"
OUM	"Ovonics Unified Memory"
Outboard Transistor	- A transistor placed in parallel with a regulating circuit to increase the amount of load current that the overall circuit can regulate. The outboard transistor kicks in at a predetermined current level and supplies the extra current needed by the load.
Outgoing Message	- Message played to caller on a TAM	digital ogm
Output Device	- Is a peripheral unit that translates signals from the computer into a human readable form or into a form suitable for reprocessing by the computer at a later stage	graphical display unit, interrupt, music synthesiser, paper tape punch, plotter, printer, speech synthesiser
Output Impedance	- Another term used for the Thevenin impedance of an amplifier	closed loop quantity
Output Offset Voltage	- Any deviation or difference of the output voltage from the ideal output voltage
Oval Extension	- Material added to hole land patterns for added strength or to prevent drilled hole break-out on small via interconnections
Overflow	- Occurs when arithmetic operations produce results which are too large to store	overflow flag
Overflow Flag	- Is a single bit that is set to 1 when overflow occurs during an arithmetic 36 Key operation
Overlay	- Is the process by which convenient subdivisions (segments) of a large program are brought from backing store for processing
Overloading	- Using a load resistance so small that it increases the voltage gain of an amplifier by a noticeable amount	buffer amplifier
Overwriting	- Is the erasing of a data item from store by writing another in its place
OWF	"Optimum Working Frequency"
OXH	- An OPL header file for inclusion in OPL source code, specifying the public interface to an OPX. Published by the OPX provider.
Oxidation	- A reaction where something loses electrons. Given that oxygen will strip electrons from most elements, this has historically meant a reaction involving oxygen. A cathode (electron emitter) is constantly oxidized as it looses electrons.	Redox