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 examinations (stating the content, emphasis, and time allotments for the examinations); (2) examinations schedule (listing the calendar dates and times for the specific examinations); (3) preparation of the examinations (describing the review process); (4) scoring of the examinations (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, manipulations of data, rounding numbers and an explanation of cognitive levels. (ML)