ESPD is the first expert system for the psychological interpretation of drawings. The purpose of the software is to help psychologists, psychiatrists, art therapists, teachers, social workers, who applies drawing tests for the psychological analysis of the personality. The program is designed for the interpretation of House-Tree-Person Test, Human Figure Drawings, Tree Drawings, Animal Drawings and Free Drawings. The analysis is performed with sophisticated artificial intelligence techniques. The result is a psycho diagnostic report with diagrams and psychological scales. The ESPD was developed on the basis of 25.000 drawings by seven years of scientific research and received several scientific awards in Psychology.Version 3.3 includes 90 psychological scales, 783 drawing signs, 3701 drawing samples, 3990 psychological concepts, 7886 inference rules, 10.000 heuristics, new differential diagnostic search and a built-in training with drawing samples (online courses also available).