QS-9000 is a quality system standard that focuses on helping automotive suppliers ensure that they are meeting/exceeding automotive customer requirements. As mentioned before, it uses ISO 9000 as a core (document control, corrective action, auditing, etc.), but adds quite a few additional requirements.
QS-9000 is now being replaced by a newer related standard called ISO/TS 16949. TS 16949 contains all of ISO 9000, QS-9000, and many European standards.
TS is much more process-oriented than QS or ISO. It defines the business as a set of processes with inputs and outputs that need to be defined, controlled, improved/optimized, etc. In my view TS looks like someone who knew QS took Six Sigma/BB training and incorporated many of the SS/BB ideas.