| ALGAN | ⊕ 1964 | ↓ ↑ ⊕ Specialised Languages | ⊕ Algebraic | ⊕ Germany | An extension of FORTRAN to solve sets of linear equations |
| ALGOL X | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ Germany | Algol 60 revision proposal |
| HOI | ⊕ 1964 | ⊕ Germany | HYTRAN Operations Interpreter | ||
| TR4 | ⊕ 1964 | ↓ ↑ ⊕ String and List Processing | ⊕ Definition languages | ⊕ Germany | Extensible compiler generator system for the Telefunken TR4 Computer |