Mainframe computers are powerful machines designed to handle large volumes of data and support numerous users simultaneously. They are commonly used by large organizations, such as banks and government agencies, to process transactions, manage databases, and run critical applications. Their reliability and scalability make them essential for tasks that require high availability and security. These computers are known for their ability to perform complex calculations quickly and efficiently. Mainframes often run specialized operating systems, such as z/OS, and can support various programming languages. Despite the rise of cloud computing and distributed systems, mainframes continue to play a vital role in enterprise computing environments.