| ADES | 1955 | ↓ ↑ ⊕ Experimental and other | ⊕ Generalised programming | ⊕ United States | Automatic Digital Encoding System |
| ADES II | 1955 | ↓ ↑ ⊕ Experimental and other | ⊕ Generalised programming | ⊕ United States | Automatic Digital Encoding System v II |
| ASSEMBLER | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Modification of Rochester Assembler at IBM Poughkeepsie |
| AUTOCODER | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | IBM generalised autocode |
| BASE 00 | 1955 | ↓ ↑ ⊕ On-Line | ⊕ Other US historic | ⊕ United States | SEAC interpreter |
| BELL | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Bell Labs Interpreters | ⊕ United States | Bell labs compilers |
| BIOR | 1955 | ↓ ↑ ⊕ Multi-purpose | ⊕ COBOL coeval | ⊕ United States | Autocode for the UNIVAC |
| BOGART | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | Fort Meade Autocode |
| CAGE | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | GE Optimising autocode |
| CORBIE | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | NBS 704 Autocode |
| CYCLONE Initial orders | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Initial orders | ⊕ United States | CYCLONE's initial orders |
| EASE | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | GM Allison autocode |
| Elliot 401 Autocode | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Autocode Coeval | ⊕ United Kingdom | Elliot Bros Autocode |
| FLAIR | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | Autocode for 650 |
| FLIP/SPUR | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assembly packages | ⊕ United States | Combination of autocode and assembler for UNIVAC 1103 |
| FLIP-SPUR | 1955 | ⊕ Low-level Autocoders | ⊕ United States | Combination of autocode and assembler for UNIVAC 1103 | |
| G2 | 1955 | ⊕ Initial orders | ⊕ Germany | Gottingen initial orders and assembly system | |
| GP | 1955 | ↓ ↑ ⊕ Multi-purpose | ⊕ Generalised programming | ⊕ United States | Generalized Programming Compiler |
| GPX | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Generalised programming | ⊕ United States | General Programming Extended |
| INTERCOM | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | Bendix scientific autocode |
| IPL-II | 1955 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ United States | Information Processing Language version 2 |
| IPL-III | 1955 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ United States | Information Processing Language version 3 |
| IT | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | Internal Translator mathematical autocoder |
| IT | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Internal Translators | ⊕ United States | Algebraic interpreter for IBM 705 |
| KOMPILER 2 | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Multiline | ⊕ United States | Hybrid algebra flow language |
| L1 | 1955 | ↓ ↑ ⊕ Multi-purpose | ⊕ Bell Labs Interpreters | ⊕ United States | Bell 1 interpreter |
| L2 | 1955 | ↓ ↑ ⊕ Multi-purpose | ⊕ Bell Labs Interpreters | ⊕ United States | Bell L2 interpreter |
| L3 | 1955 | ↓ ↑ ⊕ Multi-purpose | ⊕ Bell Labs Interpreters | ⊕ United States | Bell L3 Interpreter |
| MAFIA | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ United States | Lockheed matrix algebra system |
| MAGIC I | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ United States | Michigan algebraic coder |
| Mailüfterl | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ W European algorithmic systems | ⊕ Austria | Autocode for Mailüfterl |
| MATHMATIC | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | Mathematically oriented autocode |
| MATH-MATIC | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | Mathematically oriented autocode |
| MATRIX | 1955 | ↓ ↑ ⊕ Specialised Languages | ⊕ Matrix | ⊕ United Kingdom | Ferranti Matrix Interpretive Scheme |
| MISCRAP | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assembly packages | ⊕ United States | Lockheed diagnostic compiler for 1103A |
| MITILAC | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Macroassemblers | ⊕ United States | MIT macroassembler |
| MITLAC | 1955 | ⊕ United States | |||
| NAREC Coding System | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | Navy Ordinance Lab Autocoder |
| NOL Speed Code | 1955 | ⊕ Low-level Autocoders | ⊕ United States | Ordinance Lab Autocoder | |
| NORC COMPILER | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | Compiler for the Naval Ordnance |
| PACT I | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Low-level Autocoders | ⊕ United States | Translator for SHARE IBMs |
| PP-2 | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Moscow languages | ⊕ Russian Federation | Russian automatic programming system |
| QUEASY | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | NOTS autocode for IBM 701 |
| RAWOOP | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Macroassembler for UNIVAC 1103 |
| RECO | 1955 | ⊕ United States | Symbolic assembler for the Remington Rand Univac 1103 | ||
| REG-SYMBOLIC | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assemblers | ⊕ United States | Los Alamos symbolic assembler |
| RELATIVE | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | Interpretive autocode at GM Allison |
| SCRIPT | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | GE Hanford autocoder |
| SELFRIDGE | 1955 | ↓ ↑ ⊕ Specialised Languages | ⊕ Expression oriented | ⊕ United States | Analog simulation language |
| Sequentielle Formelübersetzung | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ W European algorithmic systems | ⊕ Germany | High-level algbraic compiler |
| SIR | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Autocode Coeval | ⊕ United States | IBM Autocoder for IBM 650 |
| SIR | 1955 | ⊕ United States | Floating Point Autocode | ||
| SNAP | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Symbolic assembly packages | ⊕ United States | Ramo Woolridge floating point package for UNIVAC 1103 |
| SOAP | 1955 | ↓ ↑ ⊕ Multi-purpose | ⊕ Symbolic assemblers | ⊕ United States | Symbolic Optimal Assembly Program |
| SPEED CODING | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Low-level Autocoders | ⊕ United States | Redstone Arsenal Autocode |
| TAC initial orders | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Initial orders | ⊕ Japan | Initial order for the TAC computer |
| UNICODE | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Fortran I-III Coeval | ⊕ United States | UNIVAC hybrid of FORTRAN and MATH-MATIC |
| Universal Code | 1955 | ⊕ Low-level Autocoders | ⊕ United States | Moore school SEAC autocoder | |
| Wisconsin Dual | 1955 | ⊕ United States | |||
| Wolontis-Bell Interpreter | 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Bell Labs Interpreters | ⊕ United States | High level interpreter at Bell labs for 650 |
| ZMD Algorithmic | 1955 | ↓ ↑ ⊕ Numerical Scientific | ⊕ International | GAMM precursor to IAL |