This SAE Aerospace Recommended Practice (ARP) establishes software capability guidelines for computer controlled test equipment@ hereinafter referred to as automatic test equipment (ATE)@ for testing hydraulic components. A typical ATE system is shown in Figure 1. The items herein have been selected as potential features which may or may not be applicable to a particular application. This document does not address software development requirements@ qualification procedures@ or hardware design requirements@ but encourages users to refer to existing documents@ defined in 2.1.1@ for guidance on such issues.