Coupled lectures on Classification and Clustering will be given in the CMCI seminar in April and May. These two approaches have been widely used for screening and system descriptions, but there seems to be more in the future in terms of image processing and analysis, as we have seen in the CMCI seminar in March. For this reason we asked for introduction for these two topics by two experts in the EMBL. Bernd Fischer will give us a lecture on Classification and Machine learning, and Jean-Karim Heriche will give a lecture on cluster analysis.