"RPG IV", a.k.a. "RPGLE" or "ILE RPG",) was released in 1994 as part of the V3R2 release of OS/400 (now known as IBM i). With the release of RPG IV, the RPG name was officially no longer an initialism. RPG IV offered a greater variety of expressions within its Extended Factor-2 Calculation Specification and, later in life, its free-format Calculation Specifications and Procedure syntax. RPG IV is the only version of RPG supported by IBM in its long line of successors to the AS/400 system (iSeries, System i, etc.).