The author describes his 10-year experience of using computer imagery for the preparation of surgical procedures and their predictability. The final results prove to be comparable with those programmed, in particular, in the case of rhinoplasty and liposuction. In the case of operations for rejuvenation, the computer is of some help. However, for the patient, the clinical demonstration in front of a mirror is more effective. As for surgical interventions on the breast, whether for enlargement or for reduction, it is very difficult to anticipate the final result with a computer.