Overhead may be: *

Overhead (business) In business, an overhead or overhead expense is an ongoing expense of operating a business. Overheads are the expenditure which cannot be conveniently traced to or identified with any particular revenue unit, unlike operating expenses such as raw m ...

, the ongoing operating costs of running a business *

Engineering overhead In engineering, some methods or components make special demands on the system. The extra design features necessary to meet these demands are called overhead. For instance, in electrical engineering, a particular integrated circuit might draw larg ...

, ancillary design features required by a component of a device **

Overhead (computing) Overhead in computer systems consists of shared functions that benefit all users or processes but are not directly attributable to any specific task. It is thus similar to overhead in organizations. Computer system overhead shows up as slower pr ...

, ancillary computation required by an algorithm or program ** Protocol overhead, additional bandwidth used by a communications protocol **

Line code In telecommunications, a line code is a pattern of voltage, current, or photons used to represent digital data transmission (telecommunications), transmitted down a communication channel or written to a storage medium. This repertoire of signal ...

or encoding overhead, additional bandwidth required for physical line transmission *

Overhead information Overhead in computer systems consists of shared functions that benefit all users or processes but are not directly attributable to any specific task. It is thus similar to overhead in organizations. Computer system overhead shows up as slower pr ...

, for telecommunication systems * File system overhead, storage or other consideration required by a file system that is not directly related to data. For example, in tape data storage, the separator between one file and the next is overhead. * Any physical object situated, or action occurring above: **

Overhead line An overhead line or overhead wire is an electrical cable that is used to transmit electrical energy to electric locomotives, Electric multiple unit, electric multiple units, trolleybuses or trams. The generic term used by the International Union ...

, for power transmission **

Overhead cable An overhead cable is a cable for the transmission of information, laid on utility poles. Overhead telephone and cable TV lines are common in North America. These poles sometimes carry overhead power lines for the supply of electric power. Pow ...

, for signal transmission **

Overhead projector An overhead projector (often abbreviated to OHP), like a Movie projector, film or slide projector, uses light to Projector, project an enlarged image on a Projection screen, screen, allowing the view of a small document or picture to be shared ...

, a display system **

Overhead storage Overhead storage can refer to Shelf (storage), shelves, Wardrobe, cabinets, hooks, lift tables or T-slot structural framing, track systems mounted at height (either ceiling-hung or wall-hung), and can be a form of Area, area-saving storage by m ...

, for example overhead storage bins, racks, shelves, cabinets or track systems in aircraft, trains or buildings *

Overhead cam An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combusti ...

, a mechanical device * Overhead join, in air traffic control *

Overhead press The overhead press, also known as the shoulder press, strict press or military press, is an upper-body weight training exercise in which the trainee presses a weight overhead while seated or standing. It is mainly used to develop the anterior de ...

, an upper-body weight training exercise in *

Overhead crane An overhead crane, commonly called a bridge crane, is a type of crane found in industrial environments. An overhead crane consists of two parallel rails seated on longitudinal I-beams attached to opposite steel columns by means of brackets. ...

or bridge crane, a type of crane sliding on two parallel rails

See also