During the actual lectures, features of the COSY-Julich accelerator were pr
esented, followed by a short summary of ongoing experiments at the COoler S
Ynchrotron COSY using internal as well as external beams in the range of 45
MeV to 2.5 GeV. Here the research of the COSY-11 collaboration is presente
d. This 0(0) facility studies the hidden and open strangeness production ob
serving the eta and eta' as well the K+Y and K+K- production in the proton
- proton interactions at the respective thresholds.