| Base Language | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Single-assignment | ⊕ United States | |
| CARPS | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Ad hoc query languages | ⊕ United States | Word-problems language |
| DPL | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Generalised programming | ⊕ United States | Dataless Programming Language |
| GEA | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Graph | ⊕ Italy | Graph Extended ALGOL |
| GRASPE | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Graph | ⊕ United States | |
| LRLTRAN | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Non Standard FIV | ⊕ United States | Vector processing FORTRAN extension |
| MIX | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Symbolic assemblers | ⊕ United States | MIX Assembly Language |
| PSYCHOL | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Experiment control and recording | ⊕ United Kingdom | language for psychological experimentation |
| REL | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Grammar and Syntax-oriented | ⊕ United States | Rapidly Extensible Language |
| TERMAC | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Matrix | ⊕ United States | Matrix language |
| TSAR | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | ⊕ Statistical | ⊕ United States |