The IBM System/360 is a family of mainframe computers introduced by IBM in 1964. It was revolutionary because it provided a compatible architecture that allowed different models to run the same software, making it easier for businesses to upgrade their systems without losing their applications. The System/360 was designed to handle a wide range of tasks, from scientific calculations to business data processing. Its introduction marked a significant shift in computing, as it standardized hardware and software, influencing future computer designs and leading to the development of modern computing systems.