Overlay may refer to:

Computers

Overlay network An overlay network is a computer network that is layered on top of another network. Structure Nodes in the overlay network can be thought of as being connected by virtual or logical links, each of which corresponds to a path, perhaps through ...

, a computer network which is built on top of another network *

Hardware overlay In computing, hardware overlay, a type of video overlay, provides a method of rendering an image to a display screen with a dedicated memory buffer inside computer video hardware. The technique aims to improve the display of a fast-moving video im ...

, one type of video overlay that uses memory dedicated to the application *Another term for

exec Exec or EXEC may refer to: * Executive officer, a person responsible for running an organization * Executive producer, provides finance and guidance for the making of a commercial entertainment product * A family of kit helicopters produced by Rot ...

, replacing one process by another *

Overlay (programming) In a general computing sense, overlaying means "the process of transferring a block of program code or other data into main memory, replacing what is already stored". Overlaying is a programming method that allows programs to be larger than th ...

, a technique to reduce the amount of memory used by a program *

Overlay keyboard An overlay keyboard or concept keyboard is a specialized keyboard Keyboard may refer to: Text input * Keyboard, part of a typewriter * Computer keyboard ** Keyboard layout, the software control of computer keyboards and their mapping ** Keyboar ...

, a specialized keyboard with no pre-set keys * Keyboard overlay, a sheet of printed text sitting between the keys, depicting an alternate keyboard layout *

Vector overlay Vector overlay is an operation (or class of operations) in a geographic information system (GIS) for integrating two or more vector spatial data sets. Terms such as ''polygon overlay'', ''map overlay'', and ''topological overlay'' are often used ...

, an analysis procedure in a geographic information system for integrating multiple data sets

Other uses

Overlay architecture Overlay architecture, or Overlay, is "event architecture", such as the temporary elements that are added to more permanent buildings to enable the operation of major sporting events or festivals. These elements provide additional facilities for t ...

, temporary elements that supplement existing buildings and infrastructure for major sporting events or festivals *

Overlay control In silicon wafer manufacturing overlay control is the control of pattern-to-pattern alignment necessary in the manufacture of silicon wafers. Silicon wafers are currently manufactured in a sequence of steps, each stage placing a pattern of material ...

, in semiconductor manufacturing, for monitoring layer-to-layer alignment on multi-layer device structures *

Overlay plan Overlay may refer to: Computers * Overlay network, a computer network which is built on top of another network * Hardware overlay, one type of video overlay that uses memory dedicated to the application *Another term for exec, replacing one proce ...

, a method of introducing new area codes in telephony *

Historic overlay district A historic overlay district is a layer of local planning regulation in the United States which incorporates the restrictions of the underlying zoning for a given geographic area, with the main goal of preserving the historic character of the neighb ...

, a zoning district that applies special rules to a portion of other districts, usually for historic or conservation reasons *

Video overlay {{Distinguish, on-screen display Video overlay is any technique used to display a video window on a computer display while bypassing the chain of CPU to graphics card to computer monitor. This is done in order to speed up the video display, and it ...

, techniques to display video on computer display *When the payoffs in gambling are greater than the costs; see

Advantage gambling Advantage gambling, or advantage play, refers to legal methods used to gain an advantage while gambling, in contrast to cheating. The term usually refers to house-banked casino games, but can also refer to games played against other players, suc ...

Computers

Other uses

See also