Because .7z is a high-compression format, this file might simply be a generic part of a multi-volume set (where the next file would be PKM02.7z). How to Use 7-Zip to Compress Files and Extract Files
In a professional or productivity context, stands for Personal Knowledge Management . A "PKM01.7z" file might be a backup of a management system containing: PKM01.7z
Assembly files or scripts for "Decompilation" projects that allow fans to edit the original game code. Because
Clean or "hacked" versions of Pokémon Red or Blue . Because .7z is a high-compression format
A collection of PDFs, templates, and guides for organizational use. 3. General Data Archive