| Basic PDP-1 Lisp | ⊕ 1963 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | |
| LISP 2 | ⊕ 1963 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | A system based on ALGOL but also containing many of the facilities and concepts of the original LISP systems. |