We have developed two CAI (Computer Aided Instruction) application software for the use of students at agricultural colleges. Hardware and software platforms for the applications are Macintosh SE (Apple Computer) and HyperCard ver. 1.2.1 (Apple Computer). The developed software (stacks) use graphical images, sounds, and animation techniques to keep users attracted to the screen. They also contain pop-up explanations of words and terms and mini-tests for understanding technical words and for self understanding user's achievement on the subjects, respectively.
According to results of questionnaires answered by the test users, in general, the stacks were judged as easy to use and user friendly. However, the users indicated some points need to be improved. Future improvement on the user interface is necessary; at the same time, it is also necessary to keep the developmental environment simple for non-professional programmers.