Ts 05.7z Guide

Common in video broadcasting or digital television data (e.g., MPEG-2 TS).

Do you have more on where you found this file, or are you trying to find a specific password to open it? 0000950103-12-000844.txt - SEC.gov

Because .7z files are generic containers, you will need a utility like 7-Zip or WinRAR to open it and view the specific contents.