ZetaLisp

ZetaLisp is an early programming language designed for artificial intelligence research. It extends the Lisp language, which uses parentheses and symbolic expressions, making it well-suited for handling complex data and symbolic reasoning. ZetaLisp introduced features like garbage collection and advanced data types to improve efficiency. It was used mainly in academic and research settings during the 1970s and 1980s to develop AI programs, enabling computers to perform tasks that mimic human reasoning, such as understanding language and solving complex problems.