You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. 7z Format - 7-Zip 18 Documentation
: You can often right-click the file and select Extract All or use the open-source 7-Zip tool to open it. J&M123.7z
Since .7z is a compressed archive format, you cannot read the text inside without first decompressing or "unzipping" the file. You can use 7-Zip on any computer, including
: Modded or compressed game files (like those for Jet Moto or other retro titles) sometimes use "J&M" or similar shorthand in archive names. J&M123.7z