IBM designs and manufactures the Power Systems server hardware and the IBM i operating system that trace back to the original AS/400, including the current Power 11 generation.
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IBM is the manufacturer behind the entire AS400/IBM i Power Systems lineage: the original AS/400 hardware, the OS/400 operating system that became IBM i, and the current Power Systems server line including Power 11. IBM also owns DB2 for i, PowerVM, and the RPG language toolchain used across the platform.