This paper presents a module system designed for largescale programming in Scheme. The module system separates specifications of objects from their implementations, permitting the separate development, compilation, and testing of modules. The module system also includes a robust macro facility.We discuss our design goals, the design of the module system, implementation issues, and our future plans.
It is an unfortunate fact of life that where there are multiuser computer systems, there will be antisocial behavior. On bulletin board systems (BBS S), there are those who persist in being obscene, harassing, and libelous. In virtual worlds such as MUDS, there are problems of theft, vandalism, and virtual rape.
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