RPG (Report Program Generator) is a programming language that originated
as a report-building program used in DEC and IBM minicomputer operating
systems and evolved into a fully procedural programming language. Its latest version, RPG IV, is supported by IBM's leading minicomputer system, the AS/400. Historically, RPG has probably been the second most used programming language, after COBOL, for commercial applications on mid-range computers.
"Boy, I can't wait to get to my AS/400 to program some RPG!"