The Gittinger Assessment Center (GAC) at Hocking Technical College is a psychological service unit whose thrust is to provide educational testing, individual counseling, and tutorial assistance to enhance the learning process. Students' academic, personal, and social needs are identified through an individualized assessment process, which serves as the basis for individualized student development prescriptions. This report provides an introduction to the GAC and its services. After a general description, the GAC's services to business/industry are discussed, including information on the value of personality assessment in the workplace and the GAC's role in providing assessment and teaching others to set up their own assessment centers. The next sections: (1) describe GAC's Personality Assessment System (PAS), the principal instrument by which personality information is gathered; (2) explain Gittinger's Personality Descriptive System, including its intellectual variable, mechanical procedural variable, and social variable components; (3) elaborate on externalizer-internalizer variables; (4) offer sample PAS profiles; (5) explain the Myers-Briggs Type Indicator (MBTI) and offer sample MBTI profiles; (6) offer information on the Canfield Learning Style Preferences Inventory; and (7) present brief descriptions of the diagnostic placement tests used in the GAC (i.e., the Nelson-Denny Reading Test, the Diagnostic Writing Sample, and the Career Planning Program). A resource guide to GAC videotapes is appended. (EJV)