| 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 |