Next: BDB - a database for all types of double stars . ... Numerical and bibliographical Databases in Atomic and Molecular Physics are essential for both the modelling of various astrophysical media and the interpretation of astrophysical spectra provided by ground or space-based telescopes. ... As an example we present the current status of a numerical and bibliographical database concerning collisional ro-vibrational excitation rate coefficients of molecules ( http://basecol.obs-besancon.fr ) . ...