| *n | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ United States | ||
| 1.pak | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Graph | ⊕ Canada | Goal-directed graph-pattern-matching language |
| ABC ALGOL | 1973 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ Netherlands | ALGOL 60 extension for symbolic math |
| ADC | 1973 | ||||
| ADPPRS | 1973 | ||||
| ALIAS | 1973 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Pascals | ⊕ Netherlands | Bliss variant |
| AP/1 | 1973 | ||||
| APLBAGS | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ 2d shape | ⊕ United States | Graphical extensions to APL |
| APLGOL-2 | 1973 | ⊕ United States | |||
| ASPOL | 1973 | ⊕ United States | |||
| ASTAP | 1973 | ⊕ United States | |||
| AUT-QE | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Netherlands | ||
| BASCMP | 1973 | ⊕ United States | |||
| BEDSOCS | 1973 | ⊕ Process interaction | ⊕ United Kingdom | ||
| BELTEL | 1973 | ||||
| BEST400 | 1973 | ↓ ↑ ⊕ Business Data Processing | ⊕ Report Generators | ⊕ United States | BESTOP language |
| Birtwhistle GPSSS | 1973 | ⊕ United Kingdom | |||
| BUILD | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ 3d shape | ⊕ United Kingdom | Solid modelling language |
| CAGES | 1973 | ⊕ United States | |||
| CAISYS | 1973 | ⊕ United States | |||
| CAL | 1973 | ⊕ United States | |||
| CDLM | 1973 | ⊕ HDLs | ⊕ United Kingdom | Manchester CDL | |
| CELLSIM | 1973 | ⊕ Systems | ⊕ United States | Cell population simulation | |
| CHEMCSMP | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Chemical process languages | ⊕ United States | CSMP dialect with special features for chemistry modelling |
| CHIEF | 1973 | ↓ ↑ ⊕ Experimental and other | ⊕ Netherlands | ||
| CLAG | 1973 | ↓ ↑ ⊕ On-Line | ⊕ Process interaction | ⊕ Netherlands | Online simulation system |
| CLEOPATRA | 1973 | ⊕ United States | |||
| CLISP | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ||
| COBRA | 1973 | ⊕ Macros | ⊕ United Kingdom | Macro extension system for COBOL | |
| COMAL | 1973 | ⊕ Street basics | ⊕ Denmark | ||
| COMPUTER ANIMATION LANGUAGE | 1973 | ⊕ Animation | |||
| COMPUTER DESIGN | 1973 | ⊕ HDLs | |||
| COMSKEE | 1973 | ⊕ Text analysis | ⊕ Germany | String analysis language | |
| CONNIVER | 1973 | ⊕ United States | |||
| Criterion COBOL Compiler | 1973 | ↓ ↑ ⊕ Business Data Processing | ⊕ COBOL-68 | ⊕ United Kingdom | NCR Cobol |
| DBTG | 1973 | ⊕ United States | |||
| DECIBLE | 1973 | ||||
| DEFT | 1973 | ↓ ↑ ⊕ Numerical Scientific | ⊕ FORTRAN IV standard | ⊕ Canada | Structured FORTRAN |
| DESPL/l | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Event scheduling | ⊕ United States | Discrete event simulation language |
| DETOL | 1973 | ⊕ External systems testing | Test control language | ||
| DG/L | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ Other Algol 60s | ⊕ United States | Data General Algol 60 |
| DGL | 1973 | ||||
| DISSPLA | 1973 | ||||
| DMAD | 1973 | ⊕ United States | |||
| DSDML | 1973 | ||||
| EASEy | 1973 | ⊕ Germany | |||
| EGS3 | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Monte Carlo | ⊕ United States | SLAC Monte Carlo system |
| ELFBOL | 1973 | ⊕ United States | |||
| EXEL | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ France | ||
| FAPS | 1973 | ||||
| File Composition | 1973 | ||||
| FLUB | 1973 | ⊕ Symbolic assemblers | ⊕ United States | Assembler for abstract machine | |
| FOL | 1973 | ⊕ United States | |||
| FORMAC 73 | 1973 | ⊕ Germany | |||
| FOSIL | 1973 | ⊕ Command systems | ⊕ United States | Portable job control language | |
| GASP IV | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Hybrid | ⊕ United States | General Activity Simulation Program |
| GCL | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | General Control Language | |
| GERTS III QR | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Event scheduling | ⊕ United States | Graphical simulation system |
| glue | 1973 | ⊕ United Kingdom | |||
| GOAL | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Multiline | ⊕ United States | Ground Operations Aerospace Language |
| GRAPHIC | 1973 | ||||
| grep | 1973 | ⊕ Patterns | ⊕ United States | regular expression parser as a command line tool for unix | |
| grok | 1973 | ||||
| grok | 1973 | ⊕ Denmark | |||
| GROPE | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Graph | ⊕ United States | Graph processing language |
| GSL | 1973 | ⊕ Event scheduling | Generalized Simulation Language | ||
| GSL | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ France | Grenoble System Language | |
| HELP | 1973 | ⊕ Macros | ⊕ United States | FLIP in WISP | |
| HOLON | 1973 | ⊕ Belgium | |||
| IFTRAN | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ Non Standard FIV | ⊕ United States | FORTRAN for structured programming |
| IMP | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Columnar sheets | ⊕ United States | OMNITAB variant |
| ISL | 1973 | ⊕ Event scheduling | ⊕ United States | Interactive Simulation Language | |
| ISTRAN | 1973 | ⊕ Germany | |||
| JAP | 1973 | ⊕ Poland | |||
| JOVIAL J73 | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ Jovials | ⊕ United States | 1973 Version of JOVIAL |
| KAPPA-SPEAKEASY | 1973 | ⊕ United States | |||
| Keen Labanotation Compiler | 1973 | ⊕ Australia | |||
| LAMA | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Robotics | ⊕ United States | |
| LE/1 | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ France | ||
| LINGOL | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ United States | ||
| LIS | 1973 | ⊕ Wirth Algols | ⊕ France | Langage Implementation Systeme - protoAda | |
| LLAMA | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Robotics | ⊕ United States | Robotics control language |
| LMAD | 1973 | ||||
| Lorel | 1973 | ⊕ Japan | |||
| LOT | 1973 | ||||
| LPL | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ United States | List processing language |
| MaGen/PDS | 1973 | ⊕ United States | |||
| MAPL | 1973 | ⊕ United States | |||
| Marseille Prolog | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ France | |
| MBALM | 1973 | ⊕ United States | Microprogrammed BALM | ||
| METASIM | 1973 | ⊕ United States | |||
| MFS | 1973 | ⊕ France | |||
| MINI | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Robotics | ⊕ United States | robotics language |
| Mizar | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Algebraic | ⊕ Poland | |
| ML | 1973 | ⊕ Strict evaluation FPs | ⊕ United Kingdom | Meta Language | |
| MORTRAN | 1973 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Non Standard FIV | ⊕ United States | Dialect of FORTRAN for structural programming |
| MORTRAN 2 | 1973 | ⊕ Non Standard FIV | ⊕ United States | ||
| M-Prolog | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ France | |
| MUSIC 11 | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Sound-control | ⊕ United States | Musical composition language |
| MUSICOL | 1973 | ||||
| Nucleus | 1973 | ||||
| OL/2 | 1973 | ⊕ United States | |||
| ORAKEL | 1973 | ||||
| OSIRIS III | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Statistical | ⊕ United States | |
| PAD | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Interface and windowing | ⊕ Germany | Programming by example |
| Partridge | 1973 | ⊕ Grammar and Syntax-oriented | ⊕ United States | ||
| PAS-II | 1973 | ⊕ United States | |||
| PD Strudl | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Civil | ⊕ United States | Phi Delta STRUDL |
| PDL | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Program Design Language | |
| PDL/74 | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Program Design Language 1974 | |
| PEGS 3 | 1973 | ⊕ United States | |||
| PILOT-73 | 1973 | ||||
| PIVOT Input language | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | INput language for the PIVOT theorem prover | |
| PL/CD | 1973 | ⊕ United States | |||
| PL/CI | 1973 | ⊕ United States | |||
| PL/EXUS | 1973 | ⊕ XPLs | ⊕ United States | USer-extensible XPL | |
| PL316 | 1973 | ⊕ PL-360s | ⊕ United Kingdom | 316 port of PL-360 | |
| PLANNER-73 | 1973 | ⊕ United States | |||
| PLCV | 1973 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | ||
| POGOL | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Editing and processing | ⊕ United States | Advanced file manipulation system |
| POP-10 | 1973 | ⊕ Canada | |||
| POPCORN | 1973 | ⊕ United Kingdom | |||
| PORT-ALG | 1973 | ||||
| PROPOSAL WRITING | 1973 | ||||
| PS 1 | 1973 | ||||
| PSL/II | 1973 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | Problem Statement Language/version 2 | |
| QLISP | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | Questioning LISP |
| RCL | 1973 | ⊕ United States | Reduced Control Language | ||
| SB-Pascal | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ Pascals | ⊕ United States | |
| SB-Prolog | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ United States | |
| SDL | 1973 | Burroughs Software Development Language | |||
| SEARCH | 1973 | ⊕ United States | |||
| SED | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Editing and processing | ⊕ United States | Stream Editor |
| SEMANOL(73) | 1973 | ⊕ United States | |||
| SEQUEL | 1973 | ↓ ↑ ⊕ Business Data Processing | ⊕ RDBMs | ⊕ United States | Limited expression language for data querying |
| SETLB | 1973 | ⊕ United States | |||
| SETS | 1973 | ||||
| SFTRAN | 1973 | ⊕ United States | |||
| SFTRAN3 | 1973 | ⊕ Non Standard FIV | ⊕ United States | JPL Structured Fortran | |
| SHRIMP | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Columnar sheets | ⊕ United States | OMNITAB variant |
| SIMCMP | 1973 | ⊕ United States | |||
| Simnon | 1973 | ||||
| SIMTRAN | 1973 | ⊕ United States | |||
| SIMUL | 1973 | ⊕ United Kingdom | |||
| SIMUL. DIG. SYST. | 1973 | ||||
| SITBOL | 1973 | ⊕ United States | |||
| SPECL | 1973 | ⊕ United States | |||
| SPICE | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ 2d shape | ⊕ United States | Simulation Program with Integrated Circuit Emphasis |
| SPIFFY | 1973 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Non Standard FIV | ⊕ United States | Structured FORTRAN IV from BOEING |
| SPIL | 1973 | ⊕ United States | |||
| SPL | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | SYMBOL Programming Language | |
| STS | 1973 | ||||
| SWL | 1973 | ||||
| SYMPL | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | CDC systems language | |
| SYSTEM 2000 | 1973 | ↓ ↑ ⊕ Business Data Processing | ⊕ Labelled Matrix | ⊕ United States | |
| TASS | 1973 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Assemblers | ⊕ United Kingdom | Intermediate language produced by the Manchester SISAL compiler |
| TBLTRN | 1973 | ⊕ United States | |||
| TICS | 1973 | ||||
| TOPPS | 1973 | ⊕ Canada | |||
| TROLL | 1973 | ↓ ↑ ⊕ On-Line | ⊕ Forecasting | ⊕ United States | Array language for econometrics |
| TXTPAD | 1973 | ⊕ United States | |||
| UCI-LISP | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | |
| UNIQUE | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Command systems | ⊕ United States | Job control language |
| UNRAVEL | 1973 | ||||
| VERS2 | 1973 | ↓ ↑ ⊕ Multi-purpose | ⊕ Generalised programming | ⊕ United States | Generalised programming language |
| VIPTRAN | 1973 | ⊕ United States | |||
| VIS | 1973 | ⊕ United States | |||
| Vlisp | 1973 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ France | |
| WAVE | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Robotics language | |
| WFL | 1973 | ||||
| Wolofsky Labanotation Compiler | 1973 | ⊕ United States | |||
| WRITECOURSE | 1973 | ⊕ CAI languages | |||
| WYLBUR | 1973 | ⊕ United States | |||
| ZAPP | 1973 | ↓ ↑ ⊕ Specialised Languages | ⊕ Animation | ⊕ Canada | Animation generation language |