In this Chapter, a concrete implementation of LPL, together with the user interface of the Windows NT (and 95) version, is briefly presented. It basically consists of two modules: the compiler-interpreter system which implements the language, and the user interface which implements the communication between the user and the language. The compiler-interpreter system — subsequently called kernel — is completely independent of the user interface and can be used without any changes on other platforms or in other applications. This design principle turned out to be very beneficial when different versions of LPL on MS/DOS, Macintosh and Unix-SUN were produced (see Figure 9–1).
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