| ASSEMBLY | 1951 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Rochester Asssembler for IBM |
| Boehm | 1951 | ↓ ↑ ⊕ Numerical Scientific | ⊕ W European algorithmic systems | ⊕ Switzerland | First operator precence language |
| Klammerausdr죫e | 1951 | ↓ ↑ ⊕ Numerical Scientific | ⊕ W European algorithmic systems | ⊕ Switzerland | algebraic language |
| OMNIBAC Symbolic assembler | 1951 | ↓ ↑ ⊕ Specialised Languages | ⊕ Symbolic assemblers | ⊕ United States | First symbolic machine code |
| SORT/MERGE | 1951 | ↓ ↑ ⊕ Multi-purpose | ⊕ Sorting and editing systems | ⊕ United States | First code autogenerator |
| stanislaus | 1951 | ⊕ Predicate | ⊕ Germany | propositional calculus | |
| Whirlwind | 1951 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Other US historic | ⊕ United States | Autocode for MIT Whirlwind |