push

Push is a term used in everyday language and specialized fields, referring to applying force or initiating an action, or to delivering data or content to a recipient.

In physics, a push is a contact force exerted on an object in a direction away from the source. Pushes must overcome inertia and friction; the size is measured in newtons.

In information technology, push denotes delivering data without a request from the recipient. Push notifications are sent from servers to devices. Push is contrasted with pull data transfer, where the client requests data. In version control, git push sends local commits to a remote repository. In web and network systems, server push or HTTP/2 push delivers updates to clients without polling.

In programming, push is an operation that adds an element to the top of a stack data structure, often paired with pop.

In mathematics, push refers to pushforward, the image of a vector field or other structure under a map between spaces.

In culture, Push has been used as a title for various works, including a 1999 novel by Sapphire and a range of films and songs.