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https://www.youtube.com/watch?v=7ZdsWebj9Jw
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In 1995, IBM transitioned from 48-bit to 64-bit addressing, and from a CISC (Complex Instruction Set Computer) to a RISC (Reduced Instruction Set Computer) architecture, without impacting existing applications
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| Platform name | Operating system | Year |
|---|---|---|
| AS/400 | OS/400 | 1988 |
| iSeries | OS/400 | 2000 |
| System i | i5/OS | 2004 |
| Power Systems | IBM i | 2008 |
https://www.ibm.com/support/pages/release-life-cycle
Prior to the arrival of IBM i, System/38 was highly regarded for its object-based design, integrated relational database and security. IBM aimed to merge its entire mid-range and mainframe product range. This project did not entirely succeed, but did result in a number of innovative products, notably the 9370 and the AS/400.
The AS/400 was released in 1988 to enable users to run applications written for the System/38 and System/36. The AS/400 gained a reputation for high reliability, low cost of ownership and ease of administration.
After several rebrands over the years, including iSeries and System i, IBM merged the operating system with its Power series of processors to become Power Systems running IBM i OS.
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IBM i (integrated)
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