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The Tabletopm programs are exploratory environments and personal tools for students to learn about organizing and representing information, and about data analysis and statistics. Both programs share the same visual representation of data in which records appear as animated, movable icons. In Tabletop Jr., children can build " data " in the form of objects(More)
This paper describes the Common Lisp system that BBN is developing for its ButterflyTM multiprocessor. The BBN ButterflyTM is a shared memory multiprocessor which may contain up to 256 processor nodes. The system provides a shared heap, parallel garbage collector, and window based I/O system. The future construct is used to specify parallelism. For several(More)
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