Operating Systems – Foundations of Modern Computing - IBM OS/360 (Operating System)

Evolution of the IBM OS/360 Ecosystem Details the history and architecture of OS/360, a foundational batch processing system created by IBM for its System/360 mainframes. It outlines the transition from early configurations like PCP and MFT to the more advanced MVT, which introduced sophisticated memory management for larger machines. The overview extends to modern successors such as MVS, OS/390, and z/OS, highlighting how these systems evolved to support virtual storage and 64-bit processing. Technical sections explain essential components like the Job Control Language (JCL), the Initial Program Loader (IPL), and various data access methods. Ultimately, the source emphasizes the enduring legacy of the OS/360 lineage, which maintains application-level compatibility more than five decades after its debut.