We consider a variety of programs for training computer and information technology experts, and analyze the structure of knowledge of IT experts of various types. With the help of cluster analysis, we have established three clusters of programs, which we chose to call «mathematician/programmer», «engineer/programmer», and «system administrator». We determine didactic units related to each module of the training and obtain expert evaluation of the coverage of the modules by the didactic units. We propose a didactic structure for the training of IT experts. It includes a description of the required overall knowledge and of the requirements on the professional training level.