| GASP | ⊕ 1969 | ↓ ↑ ⊕ Experimental and other | ⊕ Graph | ⊕ United States | PL/I extension for programming graph algorithms |
| GIRL | ⊕ 1969 | ↓ ↑ ⊕ Specialised Languages | ⊕ Graph | ⊕ United States | |
| HINT | ⊕ 1969 | ↓ ↑ ⊕ String and List Processing | ⊕ Graph | ⊕ United States | Hierarchical information language |