Interlisp

Interlisp is an early programming environment developed in the 1970s that combines a programming language with tools for writing, editing, and debugging code. Built on the Lisp language, it allows users to create and manipulate software interactively, often on mainframe or workstation computers. Interlisp was influential in shaping modern integrated development environments (IDEs) by providing a seamless, interactive workspace for programmers. Its design emphasizes ease of use for complex programming tasks, supporting features like automatic error detection and symbolic processing, making it a powerful platform for research, education, and software development during its time.