Verifying that an implementation of a n e w architecture indeed matches its functional specification usually involves the use of test generators. The I B M R I S C System/6000* was tested in that w a y by the r a n d o m test program generator (RTPG), built in A P L for that purpose. Aharon, Bar-David, Dorf man, Gofman, Leibowitz, and Schwartzburd present the concepts and implementation of R T P G . They discuss the advantages of using an interactive language in test situations, where m a n y changes are m a d e with a need for rapid test creation, and the suitability of using A P L to represent computer architectures. T h o m s o n describes the efforts of a group of academic and industrial statisticians in the United Kingdom, with the support of the British A P L Association, to build on the popularity of A P L for statistics and on its ability to express specifications of mathematical functions. T h e y are creating the A P L Statistics Library (ASL), which will contain standardized A P L specifications of statistical functions. T h
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