IBM i is an operating system used on IBM Power Systems. IBM i was formerly known as i5/OS or OS/400. The new name, IBM i, was revealed on April 2, 2008. In AS/400, operating system is represented in the format VxRxMx (Version, Release, Modification, e.g. V6R1M0).
The latest Version 7.3 was released in April 15, 2016.
i5/OS Logo: