A three-level classification for describing computer assisted counseling systems is proposed. The first level consists of computer assisted systems which are information processing tools. Second level computer systems go beyond information processing and substitute for counselors in performing certain tasks. These systems, and those on the first level, are totally controlled by the counselor. The memories of such systems are completely available to the controlling counselor. Computer systems at the third level could be described as substitute counselors. Their significance is that their designers and operators would attribute to them certain characteristics found in human counselors, e.g., privileged communication or privacy. Examples of systems at the first two levels are mentioned to provide an operational definition. A rationale is given for the tri-level systems classification. Some suggested uses of third-level substitute computer systems include: (1) a catharsis system, (2) a system permitting dialogue, (3) a behavior reinforcement system, and (4) a developmental monitor system. The question of whether these systems should be developed and, if so, by whom is discussed. (PS)