"RLS" is often used as shorthand for "Release." This file might be a compressed software release package.
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
If you did not create this file or receive it from a trusted source, exercise extreme caution:
Only use the official 7-Zip or reputable alternatives like PeaZip to open it.
While "RLSOP" is not a standard industry acronym, it could stand for several things depending on the context in which you found it: