| GIER Algol | 1960 | Numerical Scientific | True ALGOL60s | Denmark | Naur's seminal ALGOL 60 |
| RegneCentralen ALGOL | 1960 | Numerical Scientific | True ALGOL60s | Denmark | Danish family of Algol 60 languages |
| slip | 1960 | Specialised Languages | Symbolic assemblers | Denmark | Macro assembler for GIER computer |