An "Atomic Unit" refers to the smallest indivisible unit of measurement in a specific context, often used in fields like physics and computer science. In physics, it can represent fundamental particles, while in computing, it may denote the smallest unit of data that can be processed or transmitted. In the context of atomic theory, atomic units simplify complex calculations by providing a standardized way to express quantities. For example, in quantum mechanics, atomic units can help streamline equations by normalizing constants, making it easier to understand the behavior of subatomic particles.