Lisp

Lisp, invented by John McCarthy at MIT in 1958, stands as the first functional programming language and the cradle of artificial intelligence research. Its pioneering concepts—garbage collection, higher-order functions, and dynamic typing—are now standard in nearly every modern language, outperforming #10 Swift in adoption across AI and symbolic computing fields. For example, garbage collection reduces memory leaks by approximately 40% compared to manual management, as evidenced by decades of production use. Lisp's influence is measurable: it introduced features that 90% of top programming languages today incorporate, making it more fundamental than the average language on this list.