| BRUIN | ⊕ 1969 | ↓ ↑ ⊕ On-Line | Other Conversational | ⊕ United States | Conversational PL/I |
| CORC | ⊕ 1963 | ↓ ↑ ⊕ Numerical Scientific | Other Conversational | ⊕ United States | CORnell Compiler |
| DOCUS | ⊕ 1969 | ↓ ↑ ⊕ Specialised Languages | Other Conversational | ⊕ United States | Interactive system |
| IMP | ⊕ 1965 | ↓ ↑ ⊕ On-Line | Other Conversational | ⊕ United States | Lampson interactive debugging environment |
| OPAK | ⊕ 1968 | ↓ ↑ ⊕ On-Line | Other Conversational | ⊕ United States | |
| PUNCHY | ⊕ 1953 | ↓ ↑ ⊕ Experimental and other | Other Conversational | ⊕ United States | Interactive tape controller |
| Sirus | ⊕ 1969 | ↓ ↑ ⊕ On-Line | Other Conversational | ⊕ Russian Federation | |
| SPUD | ⊕ 1959 | ↓ ↑ ⊕ On-Line | Other Conversational | ⊕ United States | Demonstration language |