In this course a wide spectrum of stable isotope systematics, tools and applications will be presented. In this course participants are expected to be active in discussions, questions and solutions. The convener will bring forward specific subjects, stimulate to have discussion on these subjects and expect to be directed into related subjects by way of discussion and questioning. I convener of the course like to stimulate participants to have brief presentations themselves on appropriate matters (bring your computer of memory sticks for such action). This way the convener hopes a platform is created where both students, and more advanced scientists can exchange their and/or obtain others experiences on isotopic systematics, tools, and applications.