Editing IBM System/3 (section)

==Languages==
The System/3 supported [[RPG II]], [[Fortran IV]], [[COBOL]], and ''[[Assembly Language|Assembler]]''.<ref>G360-0002-0 {{cite book |title=IBM System/3 Model 8 |date=September 1974 |publisher=IBM}}</ref>

===RPG II compiler===
The System/3 came standard with a [[IBM RPG II|RPG II]] compiler. In a card-only system, the RPG II compiler was supplied as two phases. The first phase would be booted from one input hopper of the MFCU, and the source would then be read following the compiler. An intermediate form was punched on cards, which were then read by the second phase of the compiler. An executable program deck was then punched. This executable could then be booted ("IPL'ed", for "Initial Program Load") to perform the processing desired. This process could require more than an hour for a significant-sized program.