Mainframe
Mainframe refers to large, high-performance computer systems designed for processing massive volumes of data and transactions, typically used by large organizations for mission-critical applications. These systems are known for their reliability, security, and scalability, often running specialized operating systems like z/OS and supporting legacy programming languages such as COBOL and PL/I. Mainframes are commonly used in industries like banking, insurance, government, and healthcare where high availability and data integrity are paramount.
Developers should learn mainframe technologies when working in industries that rely on legacy systems for core business operations, such as financial services, where mainframes handle billions of transactions daily. It's essential for maintaining and modernizing critical applications, as many organizations still depend on mainframes for their reliability and security features, offering career opportunities in system maintenance, migration projects, and integration with modern cloud-based systems.