| Aardappel | ⊕ 1997 | ↓ ↑ ⊕ Specialised Languages | Tree | ⊕ United Kingdom | Concurrent tree space transformation |
| NUCLEOL | ⊕ 1970 | ↓ ↑ ⊕ String and List Processing | Tree | ⊕ United States | Tree-based list processing language |
| PLATON | ⊕ 1989 | ↓ ↑ ⊕ String and List Processing | Tree | ⊕ Japan | Natural Language parsing language |
| SL | ⊕ 1981 | ↓ ↑ ⊕ Experimental and other | Tree | ⊕ United States | Structure Language |
| SNOBOL+ | ⊕ 1974 | ↓ ↑ ⊕ String and List Processing | Tree | ⊕ Israel | SNOBOL4 with trees |
| SUSL | ⊕ 1981 | ↓ ↑ ⊕ Experimental and other | Tree | ⊕ United States | Selective Updating Structure Language |
| TPS | ⊕ 1968 | ↓ ↑ ⊕ Specialised Languages | Tree | ⊕ United States | Tree Pruning System |
| TREETRAN | ⊕ 1965 | ↓ ↑ ⊕ String and List Processing | Tree | ⊕ United States | |
| Wertz trinary Lisp | ⊕ 1982 | ↓ ↑ ⊕ String and List Processing | Tree | ⊕ France | LISP with extra descriptor content |