"RLS" is often used as shorthand for "Release." This file might be a compressed software release package.
In Windows administration, "RSOP" refers to a report of applied Group Policy settings. "RLSOP" might be a typo or a specific variant of such a report archived for backup. RLSOP.7z
Some 7z vulnerabilities (like CVE-2025-0411) allow extracted files to bypass Windows' "Mark-of-the-Web" warnings, making them appear safer than they are. How to Safely Inspect the File "RLS" is often used as shorthand for "Release