| ALGAMC | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ Russian Federation | Russian Algol dialect |
| ALGOL C | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ United States | ALGOL 60 with extensions to permit user defined extensions |
| ALGOL W | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algol Ws | ⊕ Switzerland | Wirth and Hoare |
| ALGOL Y | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL68s | ⊕ International | First version of Algol 68 |
| ARGMAT | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ Germany | Matrix Algebra language |
| AUTOMAST | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ United States | automatic mathematical analysis and symbolic translation |
| BEMAT | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Matrix | ⊕ Germany | Matrix Algebra language |
| Conversational FORTRAN V | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Non Standard FIV | ⊕ United States | |
| DMALGOL | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ United States | ALGOL with data extensions |
| FAMOUS | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ United States | Algebraic system |
| FORTRAN 66 | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ FORTRAN 66 standard | ⊕ United States | |
| FORTRAN V | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Non Standard FIV | ⊕ United States | Univac super-Fortran for the 1108 |
| IFAPT | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Numerical Control | ⊕ Canada | Canadian adaptation of APT |
| IVTRAN | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Non Standard FIV | ⊕ United States | Parallel FORTRAN |
| MANIP | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ United States | A set of FORTRAN programs to manipulate expressions. |
| SDS Fortran | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Non Standard FIV | ⊕ United States | |
| UNIVAC 1108 ALGOL | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ Norway | |
| WATFOR | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ FORTRAN IV standard | ⊕ Canada | WATerloo FORtran |
| Wisconsin Algol | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ United States |