Focusing on top-down, modular programming concepts, the 2nd edition of this text shows readers how to write structured RPG programs for easy code development and maintenance. By comparing structured and standard RPG code, the book assists programmers in making the often difficult transition from previous to newer coding practices. It emphasizes the latest techniques for interactive processing and screen displays, and includes coverage of essentials such as array and table handling, sorting, merging and more. Covering AS400 and IBM S/X computers, the text has been designed for both beginners and advanced programmers. A teacher's manual is also available to accompany the book.