This guide is designed to provide essential background material about the College Board's Computerized Placement Tests (CPTs). It is recommended for administrators and staff alike. It contains the theory on which the tests are based, information concerning how to administer them, and discussions of the reports produced and how to interpret the data. The CPTs program is an assessment program based on computerized adaptive testing techniques. The methodology customizes tests according to the student's abilities, presenting the student with questions at an appropriate level for his or her abilities, knowledge, and background. Five areas are currently tested by CPTs (reading comprehension, sentence skills, arithmetic skills, elementary algebra skills, and college level mathematics). Seamless Serial Testing is a feature that allows automatic selection and administration of from one to three mathematics tests corresponding to the examinee's abilities. CPTs are a component of the ACCUPLACER student information management system. The following sections are included: (1) an introduction and overview; (2) a description of the tests; (3) test score interpretation; (4) a software overview; (5) reporting; (6) student information; (7) percentile ranks, standard errors of measurement, and tables of comparable scaled scores; (8) a glossary; and (9) an appendix of supplemental information. There are 35 tables. Selected sample test items and figures supplement the text. (SLD)