| CLP | ⊕ 1964 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ United States | Cornell List Processor |
| METEOR | ⊕ 1964 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ United States | COMIT with LISP features |
| Nu-Speak | ⊕ 1964 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ United States | List-processing extensions to FAP or FORTRAN |
| OPL-1 | ⊕ 1964 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ United States | Interactive SLIP environment |