That is-I think you are talking about ISO, the International Organization for Standardization, and the standards formulated by this organization are generally prefixed with ISO.

TS-Technical Specification is a technical specification, which can only be upgraded to an international standard after review.

Quality control of QC-quality control

I don't know what it is, but I only know that TQC is total quality control.

http://www.iso.org/iso/about.htm