| BALITAC | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | MIT Compiler for 650 |
| CHIP | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assembly packages | ⊕ United States | Wright ADC Interpeter for the UNIVAC 1103 |
| FAP | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assembly packages | ⊕ United States | Lockheed interpreter for Univac 1103A |
| MISHAP | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assembly packages | ⊕ United States | Lockheed assembler package for UNIVAC 1103A |
| OMNICODE | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | Autocoder for 650 |
| OMNIFAX | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | Compiler for Univac I |
| RELCODE | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Assmbler for UNIVAC I and II |
| SAC | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Electrodata assembler for Burroughs |
| SNIP | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assembly packages | ⊕ United States | Complex maths version of RW SNAP |
| SOAP I | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | First release of SOAP |
| SOHIO | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | SOHIO autocode for 750 |
| SPUR | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assembly packages | ⊕ United States | Floating point package |
| STAR | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Burroughs 200/205 assembler |
| SYMBOLIC ASSEMBLY | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Symbolic assembler for IBM 705 |
| TRANS-USE | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Macroassemblers | ⊕ United States | Univac 1103 macroassembler |
| UGLIAC | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | United Gas autocode |
| X-1 | ⊕ 1956 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Experimental Assembler For Univac II |