  The open strangeness production near threshold is investigated at the
internal experiment COSY-11 in different reaction channels. Recently, the main
focus has been to extend measurements of the hyperon production
pp->pK+Lambda/Sigma0 in different isospin channels as well as the associated
strangeness production in pp->ppK+K-. The experimental technique is based on
the reconstruction of the four momentum for all positively charged ejectiles.
Neutrons are detected in addition using a neutral particle detector. The
unregistered hyperon or meson is identified by means of the missing mass
technique. The present status of the analysis for both reaction channels is
presented. In case of the reaction pp->ppK+K-, very preliminary cross sections
are shown.
