This guide has been written as an applications manual for writing avionics test specifications that conform to ARINC Specification 616. It provides advice for converting ATLAS test specifications into ATLAS test programs and implementing them on Automatic Test Equipment (ATE).This guide has been written as an applications manual for writing avionics test specifications that conform to ARINC Specification 616. It provides advice for converting ATLAS test specifications into ATLAS test programs and implementing them on Automatic Test Equipment (ATE).