In 1980, Wichita State University received a grant to introduce microcomputers as interactive teaching tools in large science classrooms. Through this grant, 18 faculty in 11 departments developed software modules illustrating concepts that are often difficult to teach by usual lecture methods. To determine whether the use of microcomputers in large screen interactive demonstrations would promote more positive student attitudes towards computers, a questionnaire was administered to two groups of students (experimental and control) on a pre- and post-test basis. Students exposed to computer instruction (the experimental group) included 78 in engineering courses, 57 in chemistry, 47 in physics, and 18 in computer science. The control group consisted of 148 students enrolled in a non-microcomputer biology course. Part 1 of the questionnaire was a 17-item "Beliefs about Computers" scale designed to reflect students' general attitudes toward computers. Part 2 consisted of 12 items concerning the use of computers for instructional purposes. Statistically significant differences were found between the experimental and control groups on post-test belief scores supporting the notion that exposure to the microcomputers in classroom demonstrations fosters more positive beliefs about computers. Analysis of Part 2 items showed positive mean pre-post attitude changes on all 12 items, while a positive attitude change was noted for the control group on only one item. A list of six references and author biographies are provided. (JB)