GFD Dennou Club: Activities Data analysis and visualization tool development (DAVIS) DCL (Dennou Club Library = graphic tool) Dennou Ruby project (Ruby interface of netCDF files, Gphys = Ruby class of grid physical quantities, GAVE = Ruby visualization tools with DCL) Numerical model development I/O libraries Hierarchical set of models Knowledge archive Theoretical documents Tech notes Multi-media archive of may seminars Digital archive of GFD laboratory experiments Data archive satellite and objective analysis data