Code Division Multiple Access (CDMA) is a communication technology that allows multiple users to share the same frequency channel simultaneously. It works by assigning a unique code to each user, which helps to differentiate their signals. This means that even if many users are transmitting at the same time, their signals can be separated and decoded at the receiver's end. CDMA is widely used in mobile phone networks and satellite communications. Its ability to efficiently utilize bandwidth leads to improved capacity and better quality of service. This technology is a key component of 3G and 4G mobile systems, enhancing connectivity for millions of users.