| Avon | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ Single-assignment | ⊕ United States | |
| Cantor | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | ||
| Hybrid | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ CPL, BCPL and B | ⊕ Switzerland | |
| Joyce | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ Pascals | ⊕ United States | Simplified experimental Concurrent Pascal |
| KRS | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ Belgium | Knowledge representation system | |
| Mode | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ OO C family | ⊕ Finland | OO language with lh anonymising |
| PRESTO | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | ||
| PRS | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ Robotics | ||
| VIVID | ⊕ 1987 | ↓ ↑ ⊕ Experimental and other | ⊕ Goal description | ⊕ United States |