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In computing, the term "push" can refer to several concepts, depending on the context. The most common uses are in reference to data structures, network communication, and version control.

In data structures: The stack operation. A push is an operation that adds a new element to the top of a stack, which is a last-in, first-out (LIFO) data structure.

The process: When a new item is "pushed," it becomes the new top element, and the stack's size increases.

The opposite: The inverse operation is called pop, which removes the most recently added (the topmost) item from the stack.

In network communication: Push technology. Push technology, or server push, is a communication method where a server proactively sends data to a client, rather than waiting for the client to request it. This is in contrast to "pull" technology, where the client must actively ask for new information.

How it works: A client typically "subscribes" to a specific data stream or channel. When new content becomes available, the server automatically "pushes" the information to all subscribed clients.

In version control: Git. With version control systems like Git, push is the command used to upload local repository content to a remote repository.

The process: A developer working on a local copy of a project can use the git push command to send their new commits (changes) to a central online repository, such as one hosted on GitHub or GitLab.

The opposite: The inverse operation is git pull, which downloads and integrates changes from the remote repository to the local one.