LISA: An interactive environment for programming language development. The LISA system is an interactive environment for programming language development. From the formal language specifications of a particular programming language LISA produces a language specific environment that includes editors (a language-knowledgable editor and a structured editor), a compiler/interpreter and other graphic tools. The LISA is a set of related tools such as scanner generators, parser generators, compiler generators, graphic tools, editors and conversion tools, which are integrated by well-designed interfaces.