The hardware and software system used to create the National Opinion Research Center/Center for Research on Evaluation, Standards, and Student Testing (NORC/CRESST) item databases and test booklets for the 12th-grade science assessment are described. A general description of the capabilities of the system is given, with some specific information about how to use the system. A user's guide for accessing the item databases and producing camera-ready copy is included. TESTBUILDER is the system developed for constructing item databases and producing copy for booklet production. Two programs (FILEVISION IV and TEXTURES) must be purchased to access the system and produce copy. From the databases, test items can be extracted to be included in booklets. Appendix A is the key to the comprehensive index of science assessment materials' codes. Appendix B contains test booklets from the science assessment study in six forms (each with easy, intermediate, difficult, and more difficult test booklets) in earth science, physics, chemistry, and biology. (SLD)