Information about the diploma examinations in Mathematics 30, Biology 30, Chemistry 30, and Physics 30 that will be administered during January, June, and August, 1987, is provided in this bulletin. Topics explained include: (1) general format of the examination (stating the content, emphasis, and time allotments for the examinations); (2) examination schedule (listing the calendar dates and times for the specific examination); (3) preparation of the examinations (describing the review process); (4) scoring of the examination (specifying the required qualifications of the markers); and (5) descriptions of the Mathematics, Biology, Chemistry, and Physics examinations (explaining the content, blueprint, and distribution of questions by percentage for each of the examinations). Appendices present guidelines for significant digits, manipulation of data, and rounding and contain explanations of cognitive levels. (ML)