Overhead (business), the ongoing operating costs of running a business
Engineering overhead, ancillary design features required by a component of a device
Overhead (computing), ancillary computation required by an algorithm or program
Protocol overhead, additional bandwidth used by a communications protocol
Line code or encoding overhead, additional bandwidth required for physical line transmission
Overhead information, 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, for power transmission
Overhead cable, for signal transmission
Overhead projector, a display system
Overhead storage, for example overhead storage bins, racks, shelves, cabinets or track systems in aircraft, trains or buildings
Overhead cam, a mechanical device
Overhead join, in air traffic control
Overhead press, an upper-body weight training exercise in
Overhead crane or bridge crane, a type of crane sliding on two parallel rails