A science and engineering fair is a competition based on the quality of projects done by students, the results of which are reported through exhibits and oral presentations at the fair. Fairs operate on a step basis. Students who win in small fairs such as a local fair, move to a city fair, then to a regional fair, and may be chosen to represent that fair in the International Science and Engineering Fair (ISEF). The finalists whose project abstracts are reported in this book won the honor of presenting their projects at the 35th ISEF in Columbus, Ohio, in May, 1983 as the result of being chosen the best in 314 affiliated fairs. Abstracts are organized by project categories. These 12 groups are described and include: behavioral and social sciences; biochemistry; botany; chemistry; earth and space sciences; engineering; environmental sciences; mathematics and computers; medicine and health; microbiology; physics; and zoology. An index is also included of all the finalists. (ML)