This is the most common academic use for the acronym "STPS" in management and economic journals.
Since the file is a .rar (Roshal Archive) part 1, you will need all subsequent parts (e.g., part2.rar , part3.rar ) in the same folder to successfully extract the contents. sc23269-STPS.part1.rar
ASTM International publishes a series called , often abbreviated as STPs. This is the most common academic use for