AI defination,what is AI? It’s Done?

AT is an abbreviation that can stand for a variety of things, depending on the context in which it is used. Here are a few possible meanings:

Automated Teller (or Automatic Teller): A machine that allows people to perform financial transactions, such as withdrawing cash or depositing checks, without the need for a human teller.

Antitank: Designed to destroy or disable tanks and other armored vehicles.

AT&T: A telecommunications company that provides a wide range of products and services, including wireless communications, internet, and television.

All Terrain: Designed to be used on a variety of terrains, such as dirt, sand, or snow.

At: A preposition that means "in the direction of" or "in the vicinity of."

Without more context, it is difficult to determine which of these meanings is most relevant.