| Functional Units | ⊕ 1977 | ↓ ↑ ⊕ Experimental and other | ⊕ Actor | ⊕ Italy | Extended actor language |
| Librarian | ⊕ 1977 | ↓ ↑ ⊕ Experimental and other | ⊕ Protocol | ⊕ France | Library connection language |
| OWL | ⊕ 1977 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | KR language | |
| UNITS | ⊕ 1977 | ↓ ↑ ⊕ Experimental and other | ⊕ Frame languages | ⊕ United States | Frame language |
| XGEN | ⊕ 1977 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | Code generator generator | |
| XL | ⊕ 1977 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | Intermediate language for XGEN |