ATOPSS ( A dage T utorial O perating S ystem S imulator) was designed to provide both a learning tool and a teaching aid for the presentation of elementary operating system concepts to graduate or advanced undergraduate computer science students. As a real learning tool, the simulator itself offers real time interaction and observation of a parametric, discrete time event oriented operating system. For a teaching aid, a series of short movies has been produced using ATOPSS solely as its basis, demonstrating both the use of the simulator and the different concepts it portrays. These movies thus offer the portability necessary for in-classroom presentation and provide a basis for further discussion.

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Software reuse is the second oldest programming profession. Ever since the first program logic board was wired, people have been looking for ways of saving time and money by building upon other's efforts and not “not re-inventing any wheels.” This article summarizes the lessons I have learned as used-program salesman. Using this analogy, I will examine efforts made to institutionalize software reuse.

At SSR'95, there was a panel entitled "Software Reusability and the Internet." Since then, there has beerr an explosion of activity on the Internetespeciallywiththe introductionof Jav~the "battle of the browsers," and the difision of the Internet. This is alI impacting how we reuse software. This panel investigates how the introduction of Java has improved (or hampered) the institutionalization of sotlware reuse. Furthermore, it will look at how we can enhance systematic reuse through the new tools provided on the Internet.