Z2 is a term that can refer to various concepts, but it is often associated with the Z2 group, a fundamental structure in mathematics, particularly in group theory. The Z2 group consists of two elements, typically represented as 0 and 1, with addition defined modulo 2. This means that when you add the two elements, 1 + 1 equals 0. In computer science, Z2 can also refer to a binary system, where data is represented using two states, often denoted as 0 and 1. This binary representation is the foundation of digital computing, enabling the processing and storage of information in electronic devices.