| HAYNAM Algol extensions | ⊕ 1965 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ United States | |
| IMP | ⊕ 1965 | ↓ ↑ ⊕ Multi-purpose | ⊕ True ALGOL60s | ⊕ United States | Extensible dialect of ALGOL-60 |
| MALGOL | ⊕ 1965 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ Russian Federation | Algol 60 for the MINSK-2 |
| NU ALGOL | ⊕ 1965 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ Norway | Norwegian University Algol |