The RPG/400-rule  effectively serves programmers for AS/400 systems. The full-hard stainless steel rule is acid-etched and enamel-filled for permanence. Weighing approximately a quarter of a pound, the rules have rounded safety corners and a non-glare, brushed finish. Rule dimensions are 2-3/16" x 15-1/2". Engraving is optional in the "Return To" block on the rule.

Charts included on the rule include the following:

• Data Type
• DDS Keywords
• Edit Codes
• Name Type
• Op Codes
• Program Status Data Structure
• Special Function Words
• Usage

One edge of the rule has a 10-character per inch scale backed by a 6 lines per inch scale, and it also shows inches.

A second edge has an 8-character per inch scale for approximately 9 inches.

The remaining rule edges have scales in 10 characters per inch for the following information:

• Calculation Specifications
• Data Description Specifications
• Extension Specifications
• File Description Specifications
• Input Specifications
• Output Specifications