| ABCL/1 | ⊕ 1987 | ↓ ↑ ⊕ Specialised Languages | Actor | ⊕ Japan | Object-Based Concurrent Language |
| ABCL/f | ⊕ 1994 | ↓ ↑ ⊕ Experimental and other | Actor | ⊕ Japan | ABCL with a functional flavour |
| ABCL/R | ⊕ 1988 | ↓ ↑ ⊕ Experimental and other | Actor | ⊕ Japan | Object-Based Concurrent Language |
| ABCL/R2 | ⊕ 1992 | ↓ ↑ ⊕ Experimental and other | Actor | ⊕ Japan | reflective concurrent object-oriented language |
| ABCL/R3 | ⊕ 1998 | ↓ ↑ ⊕ Experimental and other | Actor | ⊕ Japan | Concurrent object-oriented language |
| Act1 | ⊕ 1982 | ↓ ↑ ⊕ Specialised Languages | Actor | ⊕ United States | Actor OO language |
| Actors | ⊕ 1971 | ↓ ↑ ⊕ Specialised Languages | Actor | ⊕ United States | Agent based object parallel language |
| A-NETL | ⊕ 1995 | ↓ ↑ ⊕ Experimental and other | Actor | ⊕ Japan | Concurrent OO Language |
| DAISY | ⊕ 1995 | ↓ ↑ ⊕ Specialised Languages | Actor | ⊕ Italy | |
| Functional Units | ⊕ 1977 | ↓ ↑ ⊕ Experimental and other | Actor | ⊕ Italy | Extended actor language |
| MAP | ⊕ 1993 | ↓ ↑ ⊕ Specialised Languages | Actor | ⊕ Italy | Distributed AI OO language |
| OBLIQ | ⊕ 1993 | ↓ ↑ ⊕ Specialised Languages | Actor | ⊕ United Kingdom | OO language for distributed objects |
| Ubik | ⊕ 2000 | ↓ ↑ ⊕ Specialised Languages | Actor | ⊕ United States | Generalised ACTORS system |