While "TS" is a common abbreviation in many fields, in the context of file archives and technical documentation, it frequently stands for:
Because .7z files are generic containers, you will need a utility like 7-Zip or WinRAR to open it and view the specific contents.
Frequently used in corporate environments for internal software patches or tools.
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