TESTAN (TEST and ANalysis) is an authoring shell and integrated psychometric package for development of computerized multiple-choice questionnaires, tests, and personality scales on personal computers that use MS-DOS. TESTAN allows (1) writing and editing items, interpretation messages, keys, norms, a bank of profiles, and so on, (2) collecting data in on-line or paper-and-pencil modes, (3) selecting the most discriminating items by means of correlation and factor analysis for practical use, (4) validating test scales and items according to external criteria and expert ratings, and (5) making multifactor assessment decisions after testing. TESTAN can be used to test student conceptual knowledge in any area in the form of multiple-choice questions. This report describes essential functional properties and facilities of TESTAN for psychometrists and applied psychologists.