Progress 4GL
Progress 4GL is a 4GL programming language developed by Progress Software Corporation.
It uses an imperative style to do database access. Instead of using embedded SQL expressions, Progress 4GL uses "FOR EACH" expressions to query a database or single "FIND" expressions. Next to database access expressions there is a variety of expressions to define and control forms. The language contains IF..THEN..ELSE statements and DO...WHILE statements for flow control.