Discusses the current problems associated with computer viruses that affect system and software users and the frequency with which they occur. System security is discussed, steps to take to safeguard against damage by computer viruses are suggested, and anti-viral programs, or vaccines, are described. (LRW)

Discussion of the portability of educational software focuses on the software design and development process. Topics discussed include levels of portability; the user-computer dialog; software engineering principles; design techniques for student performance records; techniques of courseware programing; and suggestions for further research and…

The concept of a qualitative model is used as the focus of this review of qualitative student models in order to compare alternative computational models and to contrast domain requirements. The report is divided into eight sections: (1) Origins and Goals (adaptive instruction, qualitative models of processes, components of an artificial…