| $ | ⊕ 1983 | ↓ ↑ Experimental and other | ⊕ United States | Theoretical simple functional programming language | |
| ABC | ⊕ 1967 | ↓ ↑ Experimental and other | ⊕ Markovs | ⊕ Russian Federation | Experimental extensible language |
| ABC | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ Graph | ⊕ Netherlands | Intermediate language ABC abstract machine |
| ABCL/c+ | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ CPL, BCPL and B | ⊕ Japan | Concurrent actor language based on C |
| ABCL/f | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Actor | ⊕ Japan | ABCL with a functional flavour |
| ABCL/R | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ Actor | ⊕ Japan | Object-Based Concurrent Language |
| ABCL/R2 | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ Actor | ⊕ Japan | reflective concurrent object-oriented language |
| ABCL/R3 | ⊕ 1998 | ↓ ↑ Experimental and other | ⊕ Actor | ⊕ Japan | Concurrent object-oriented language |
| ACE | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Spain | Parallel logic language | |
| ACL | ⊕ 1980 | ↓ ↑ Experimental and other | ⊕ Australia | A Coroutine Language | |
| ACT | ⊕ 1966 | ↓ ↑ Experimental and other | ⊕ State transition tables | ⊕ United Kingdom | Automated Contingency Translator |
| ACT | ⊕ 1958 | ↓ ↑ Experimental and other | ⊕ Generalised programming | ⊕ United States | Autocode Coding system |
| ACT II | ⊕ 1960 | ↓ ↑ Experimental and other | ⊕ Generalised programming | ⊕ United States | Autocode Coding system |
| Actalk | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ Canada | ||
| ActorSpace | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ United States | parallel language | |
| ADA | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Array | ⊕ United States | Aiken |
| 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 |
| Adl | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ Australia | Polymorphic non-recursive data-parallel functional language | |
| AKL | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Sweden | Agents Kernel Language | |
| ALF | ⊕ 1990 | ↓ ↑ Experimental and other | ⊕ Germany | ||
| Algol 68 with areas | ⊕ 1972 | ↓ ↑ Experimental and other | ⊕ True ALGOL68s | ⊕ United Kingdom | Addition of areas to Algol 68 |
| Algol H | ⊕ 1975 | ↓ ↑ Experimental and other | ⊕ True ALGOL68s | ⊕ United Kingdom | Proposed extensions to the mode system of Algol 68 |
| ALICS | ⊕ 1965 | ↓ ↑ Experimental and other | ⊕ Symbolic assemblers | ⊕ United States | ICS assembler |
| Alltalk | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ United States | Smalltalk with persistency | |
| Alma-O | ⊕ 1998 | ↓ ↑ Experimental and other | ⊕ Netherlands | Hybrid I/D language | |
| Alphard | ⊕ 1974 | ↓ ↑ Experimental and other | ⊕ Pascals | ⊕ United States | Pascal with data abstraction |
| AMPPL-II | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Substrings | ⊕ United States | Associative Memory Parallel Processing Language |
| Anderson extensions | ⊕ 1965 | ↓ ↑ Experimental and other | ⊕ Other US historic | ⊕ United States | Parallel extensions set for PLs |
| A-NETL | ⊕ 1995 | ↓ ↑ Experimental and other | ⊕ Actor | ⊕ Japan | Concurrent OO Language |
| APPL | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Animation | ⊕ United States | Animation language |
| Arche | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ France | ||
| ARCHI | ⊕ 1986 | ↓ ↑ Experimental and other | ⊕ United States | Microarchitecture description language | |
| ARTS/C | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ CPL, BCPL and B | ⊕ Japan | |
| ASBAL | ⊕ 1979 | ↓ ↑ Experimental and other | ⊕ Stack | ⊕ United States | Stack-based language derived from CLU |
| associons | ⊕ 1972 | ↓ ↑ Experimental and other | ⊕ Theoretical incl category based | ⊕ Netherlands | Tuple based programming extensions |
| AUTOTIMER | ⊕ 1957 | ↓ ↑ Experimental and other | ⊕ Debugging languages | ⊕ United States | |
| Avon | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ Single-assignment | ⊕ United States | |
| Base Language | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Single-assignment | ⊕ United States | |
| BeBOP | ⊕ 1993 | ↓ ↑ Experimental and other | ⊕ Australia | Object-oriented parallel logic programming language | |
| BIOPSI | ⊕ 1976 | ↓ ↑ Experimental and other | ⊕ Macroassemblers | ⊕ United States | |
| BLAZE | ⊕ 1985 | ↓ ↑ Experimental and other | ⊕ United States | Single assignment language for parallel processing | |
| BLAZE 2 | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ United States | Object-oriented successor to BLAZE. | |
| BLODI-G | ⊕ 1967 | ↓ ↑ Experimental and other | ⊕ Flowcharts | ⊕ United States | Grpahical programming system |
| BOMM | ⊕ 1963 | ↓ ↑ Experimental and other | ⊕ Statistical | ⊕ United States | UCLA Time-series analysis package |
| Burroughs Truth-Function Evaluator | ⊕ 1954 | ↓ ↑ Experimental and other | ⊕ Predicate | ⊕ United States | Logical evaluator system |
| CABALA | ⊕ 1975 | ↓ ↑ Experimental and other | ⊕ Scientific Basics | ⊕ Italy | Extensions to Basic for laboratory work |
| CADET | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ AV-Control | ⊕ United States | Graphical heuristic for shape-fitting |
| CAL | ⊕ 2002 | ↓ ↑ Experimental and other | ⊕ Graph | ⊕ United States | GP language for the Ptolemy project |
| Cantor | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ United States | ||
| CARPS | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Ad hoc query languages | ⊕ United States | Word-problems language |
| CCP | ⊕ 1967 | ↓ ↑ Experimental and other | ⊕ Command systems | ⊕ United States | |
| Charme | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ France | ||
| CHIEF | ⊕ 1973 | ↓ ↑ Experimental and other | ⊕ Netherlands | ||
| CHIP | ⊕ 1985 | ↓ ↑ Experimental and other | ⊕ Germany | ||
| CIAO | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Horn clause | ⊕ Spain | Distributed And/Or parallel prolog |
| CLIP | ⊕ 1958 | ↓ ↑ Experimental and other | ⊕ Information algebra | ⊕ United States | Compiler Language for Information Processing |
| CLP(R) | ⊕ 1986 | ↓ ↑ Experimental and other | ⊕ Australia | Constraint Logic Programming (Real) | |
| Computer Operations Language | ⊕ 1957 | ↓ ↑ Experimental and other | ⊕ Intermediate languages and VMs | ⊕ United States | Machine-independent language |
| Concurrent Massey Hope+C | ⊕ 1999 | ↓ ↑ Experimental and other | ⊕ New Zealand | Concurrent Dialect of Massey Hope | |
| CST | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ United States | Concurrent OO Language | |
| DDL | ⊕ 1985 | ↓ ↑ Experimental and other | ⊕ United States | adventure defintion language | |
| DDN | ⊕ 1974 | ↓ ↑ Experimental and other | ⊕ Single-assignment | ⊕ United States | Data-Driven Nets |
| DEL | ⊕ 1971 | ↓ ↑ Experimental and other | ⊕ Intermediate languages and VMs | ⊕ United States | Variable instruction set abstract interpreter |
| DEVIL | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ France | ||
| DIALECT | ↓ ↑ Experimental and other | ⊕ United States | |||
| DPL | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Generalised programming | ⊕ United States | Dataless Programming Language |
| dpSather | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ Australia | ||
| E | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ United States | C++ persistent dialect with data types | |
| EASY | ⊕ 1972 | ↓ ↑ Experimental and other | ⊕ Intermediate languages and VMs | ⊕ United States | Intermediate language |
| ECL-1 | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Interface and windowing | ⊕ United Kingdom | Environment Control Language |
| Eden | ⊕ 1995 | ↓ ↑ Experimental and other | ⊕ International | ||
| el(alpha) | ↓ ↑ Experimental and other | ⊕ Serial Operators | ⊕ Japan | ||
| Ellie | ⊕ 1990 | ↓ ↑ Experimental and other | ⊕ Prototyping | ⊕ Denmark | Distributed OO language |
| EPL | ⊕ 1984 | ↓ ↑ Experimental and other | ⊕ Pascals | ⊕ United States | Eden Programming Language - concurrent |
| EPL | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Macros | ⊕ United States | Programming language for ESS machines |
| ESPL/I | ⊕ 1978 | ↓ ↑ Experimental and other | ⊕ United States | ||
| Esterel | ⊕ 1984 | ↓ ↑ Experimental and other | ⊕ France | ||
| FGRAAL | ⊕ 1972 | ↓ ↑ Experimental and other | ⊕ Graph | ⊕ United States | Fortran Graph extensions |
| FIML | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ Lazy Evaluation FPs | ⊕ Japan | Functional and Imperative ML |
| FISh | ⊕ 1997 | ↓ ↑ Experimental and other | ⊕ Australia | ||
| FL | ⊕ 1985 | ↓ ↑ Experimental and other | ⊕ United States | Function Level | |
| FMPL | ⊕ 1976 | ↓ ↑ Experimental and other | ⊕ Prototyping | ⊕ United States | Prototyping OOL |
| FOQL | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ United States | Fuzzy Object Query Language | |
| ForceEpsilon | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ Polymorphic | ⊕ Canada | |
| FORK | ⊕ 1998 | ↓ ↑ Experimental and other | ⊕ Austria | PRAM-language | |
| FORK | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ Austria | PRAM-language | |
| Fork95 | ⊕ 1995 | ↓ ↑ Experimental and other | ⊕ Austria | PRAM-language | |
| Fornax | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Array | ⊕ United States | APL with patterns |
| Functional Units | ⊕ 1977 | ↓ ↑ Experimental and other | ⊕ Actor | ⊕ Italy | Extended actor language |
| Gallina | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ France | ||
| Gamma | ⊕ 1990 | ↓ ↑ Experimental and other | ⊕ France | Massively parallel language derived from chemical reactions | |
| GARP | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ Graph | ⊕ United States | Graph-based hybrid concurrent OO language |
| GASP | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Graph | ⊕ United States | PL/I extension for programming graph algorithms |
| GCLA II | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ Sweden | ||
| GEA | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Graph | ⊕ Italy | Graph Extended ALGOL |
| GEMS | ⊕ 1956 | ↓ ↑ Experimental and other | ⊕ Event scheduling | ⊕ United States | GE Manufacturing Simulator |
| Glee | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ Array | ⊕ United States | APL language with structures |
| Glyphic Script | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Prototyping | ⊕ United States | Prototype based scripting language |
| GpH | ⊕ 2001 | ↓ ↑ Experimental and other | ⊕ United Kingdom | Glasgow parallel Haskell | |
| GRAF | ⊕ 1967 | ↓ ↑ Experimental and other | ⊕ 2d shape | ⊕ United States | GRaphic Additions to FORTRAN |
| GRAP | ⊕ 1991 | ↓ ↑ Experimental and other | ⊕ United States | ||
| GRAP | ⊕ 1975 | ↓ ↑ Experimental and other | ⊕ United States | ||
| GRASPE | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Graph | ⊕ United States | |
| Greif formal specification language | ⊕ 1975 | ↓ ↑ Experimental and other | ⊕ United States | ||
| GSL | ⊕ 1964 | ↓ ↑ Experimental and other | ⊕ Decision tables | ⊕ United States | Generation Strategy Language |
| GTPL | ⊕ 1970 | ↓ ↑ Experimental and other | ⊕ Graph | Graph-theoretical extensions to Fortran | |
| GYVE | ⊕ 1978 | ↓ ↑ Experimental and other | ⊕ United States | Concurrent SETL dialect | |
| HACL | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Linear | ⊕ Japan | Concurrent OO language based on linear logic |
| HARVEY | ⊕ 1972 | ↓ ↑ Experimental and other | ⊕ Other Wirth Algols | ⊕ United States | ICR Bliss dialect |
| Haskell# | ⊕ 1991 | ↓ ↑ Experimental and other | ⊕ United States | Parallel dialect of Haskell | |
| Hoare super-structured Algol | ⊕ 1972 | ↓ ↑ Experimental and other | ⊕ True ALGOL60s | ⊕ United Kingdom | Algol with sets, subsets, orders etc |
| Hope+ | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ United Kingdom | ||
| Hybrid | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ CPL, BCPL and B | ⊕ Switzerland | |
| ICL | ⊕ 1978 | ↓ ↑ Experimental and other | ⊕ United States | Language for ambiguous lists | |
| Id | ⊕ 1978 | ↓ ↑ Experimental and other | ⊕ United States | Irvine Dataflow | |
| IDMS | ⊕ 1981 | ↓ ↑ Experimental and other | ⊕ 2d shape | ⊕ United States | Pictorial query language |
| ISPL | ⊕ 1971 | ↓ ↑ Experimental and other | ⊕ United States | Incremental System Programming Language | |
| IVSYS | ⊕ 1965 | ↓ ↑ Experimental and other | ⊕ Array | ⊕ United States | Early implementation of APL |
| JANUS | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Statistical | ⊕ United States | Interactive statstics system |
| JARGOL | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ Strict evaluation LISPs | ⊕ United States | Proposed algorithmic language by Rees |
| Joyce | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ Pascals | ⊕ United States | Simplified experimental Concurrent Pascal |
| Klaim | ⊕ 1997 | ↓ ↑ Experimental and other | ⊕ Italy | Kernel Language for Agents Interaction and Mobility | |
| KLIC | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Japan | ||
| KOMPILER | ⊕ 1953 | ↓ ↑ Experimental and other | ⊕ Low-level Autocoders | ⊕ United States | Livermore autocode |
| KRS | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ Belgium | Knowledge representation system | |
| Language for Class Description | ⊕ 1964 | ↓ ↑ Experimental and other | ⊕ OO C family | ⊕ United States | |
| Learner | ⊕ 1958 | ↓ ↑ Experimental and other | ⊕ United States | Self-creating programming system | |
| Librarian | ⊕ 1977 | ↓ ↑ Experimental and other | ⊕ Protocol | ⊕ France | Library connection language |
| LLilog | ⊕ 1986 | ↓ ↑ Experimental and other | ⊕ Language-oriented | ⊕ Germany | KR Lanugage |
| LogTalk | ⊕ 1998 | ↓ ↑ Experimental and other | ⊕ Portugal | OO Extensions to Prolog | |
| LOOPN | ⊕ 1993 | ↓ ↑ Experimental and other | ⊕ Australia | Petri net language | |
| LRLTRAN | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Non Standard FIV | ⊕ United States | Vector processing FORTRAN extension |
| LUCID | ⊕ 1975 | ↓ ↑ Experimental and other | ⊕ Single-assignment | ⊕ Canada | dataflow language |
| Mage | ⊕ 1967 | ↓ ↑ Experimental and other | ⊕ Other Algol 60s | ⊕ France | French Algol |
| Massey Hope+C | ⊕ 1996 | ↓ ↑ Experimental and other | ⊕ New Zealand | ||
| MERCURY | ⊕ 1995 | ↓ ↑ Experimental and other | ⊕ Australia | Logic/functional language | |
| microAPL | ⊕ 1981 | ↓ ↑ Experimental and other | ⊕ Array | ⊕ United States | Microprogramming APL Dialect |
| MIX | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Symbolic assemblers | ⊕ United States | MIX Assembly Language |
| MIX/360 | ⊕ 1970 | ↓ ↑ Experimental and other | ⊕ Symbolic assemblers | ⊕ United States | Paper assembler for TAOCP |
| MIXAL | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Symbolic assemblers | ⊕ United States | MIX Assembly Language |
| MIXAL.NET | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ Russian Federation | MIXAL for .NET | |
| Mode | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ OO C family | ⊕ Finland | OO language with lh anonymising |
| Moostrap | ⊕ 1995 | ↓ ↑ Experimental and other | ⊕ Prototyping | ⊕ France | |
| MPL | ⊕ 1990 | ↓ ↑ Experimental and other | ⊕ United States | Data-parallel version of C for MASPAR | |
| MPL | ⊕ 1971 | ↓ ↑ Experimental and other | ⊕ Microprogramming and HLAs | ⊕ United States | MicroProgramming Language |
| Music | ⊕ 1957 | ↓ ↑ Experimental and other | ⊕ Sound-Performance | ⊕ United States | Languages for musical sound synthesis |
| NCL | ⊕ 1990 | ↓ ↑ Experimental and other | ⊕ United States | Network prolog | |
| NETL | ⊕ 1979 | ↓ ↑ Experimental and other | ⊕ Frame languages | ⊕ United States | |
| NODAL | ⊕ 1974 | ↓ ↑ Experimental and other | ⊕ Generation of JOSS I | ⊕ Switzerland | High level declarative language for physics research |
| NPL | ⊕ 1963 | ↓ ↑ Experimental and other | ⊕ IBM PL/Is | ⊕ United States | New Programming Language |
| Orthogonal | ⊕ 1996 | ↓ ↑ Experimental and other | ⊕ Crossword | ⊕ United States | 2nd version of 2d language |
| OSL/2 | ⊕ 1970 | ↓ ↑ Experimental and other | ⊕ Other algorithmic | ⊕ United States | Systems language |
| OWL | ⊕ 1977 | ↓ ↑ Experimental and other | ⊕ United States | KR language | |
| PACOL | ⊕ 1974 | ↓ ↑ Experimental and other | ⊕ Israel | Language to control programming components | |
| PANON-1B | ⊕ 1965 | ↓ ↑ Experimental and other | ⊕ Patterns | ⊕ Italy | Pattern-directed symbol manipulation language |
| PEESPOL | ⊕ 1971 | ↓ ↑ Experimental and other | ⊕ Microprogramming and HLAs | ⊕ United States | UoI microprogramming system |
| PINBOL | ↓ ↑ Experimental and other | ⊕ Decision tables | ⊕ United States | Decision table language for controlling pinball machines | |
| PISTOL | ⊕ 1983 | ↓ ↑ Experimental and other | ⊕ United States | Portably Implemented STack Oriented Language | |
| PL/CS | ⊕ 1974 | ↓ ↑ Experimental and other | ⊕ Other PL/Is | ⊕ United States | PL/I subdialect for the CPS |
| PLASM | ⊕ 1995 | ↓ ↑ Experimental and other | ⊕ Italy | Geometry-oriented functional language | |
| PLCV | ⊕ 1973 | ↓ ↑ Experimental and other | ⊕ United States | ||
| PM2 | ⊕ 1990 | ↓ ↑ Experimental and other | ⊕ Pascals | ⊕ Australia | Parallel Modula-2 |
| POLYGOTH | ⊕ 1990 | ↓ ↑ Experimental and other | ⊕ France | ||
| Postmark | ⊕ 1992 | ↓ ↑ Experimental and other | ⊕ Sound-Performance | ⊕ Australia | Stack based musical composition language |
| PREDULA | ⊕ 1991 | ↓ ↑ Experimental and other | ⊕ Pascals | ⊕ Sweden | Data-parallel Pascal |
| PRESTO | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ United States | ||
| PRIZ | ⊕ 1983 | ↓ ↑ Experimental and other | ⊕ Estonia | Logic programming environment | |
| PRL | ⊕ 1983 | ↓ ↑ Experimental and other | ⊕ United States | Proof Refinement Logic | |
| Progol | ⊕ 1993 | ↓ ↑ Experimental and other | ⊕ United Kingdom | ||
| Prolog-ELF | ⊕ 1985 | ↓ ↑ Experimental and other | ⊕ Horn clause | ⊕ Japan | |
| PRORAB | ⊕ 1957 | ↓ ↑ Experimental and other | ⊕ Lenigrad languages | ⊕ Russian Federation | Leningrad Programming System |
| ProtoHyperflow | ⊕ 1993 | ↓ ↑ Experimental and other | ⊕ United States | ||
| PRS | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ Robotics | ||
| pSather | ⊕ 1991 | ↓ ↑ Experimental and other | ⊕ United States | parallel Sather | |
| PSL | ⊕ 1970 | ↓ ↑ Experimental and other | ⊕ Goal description | ⊕ United States | Problem Statement Language |
| PSL/II | ⊕ 1973 | ↓ ↑ Experimental and other | ⊕ United States | Problem Statement Language/version 2 | |
| PSL/PSA | ⊕ 1976 | ↓ ↑ Experimental and other | ⊕ United States | Problem Statement Language/Problem Statement Analyzer | |
| PSYCHOL | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Experiment control and recording | ⊕ United Kingdom | language for psychological experimentation |
| PUNCHY | ⊕ 1953 | ↓ ↑ Experimental and other | ⊕ Other Conversational | ⊕ United States | Interactive tape controller |
| RC | ⊕ 1991 | ↓ ↑ Experimental and other | ⊕ France | Reactive C | |
| Reaction Handler | ⊕ 1967 | ↓ ↑ Experimental and other | ⊕ Experiment control and recording | ⊕ United Kingdom | Control language for experimentation |
| Real-Time Concurrent C | ⊕ 1991 | ↓ ↑ Experimental and other | ⊕ CPL, BCPL and B | ⊕ United States | Real-time extensions to Concurrent C |
| REL | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Grammar and Syntax-oriented | ⊕ United States | Rapidly Extensible Language |
| ROLOG | ⊕ 1996 | ↓ ↑ Experimental and other | ⊕ United States | ||
| Rosette | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ United States | Concurrent OO Language | |
| RPL | ⊕ 1992 | ↓ ↑ Experimental and other | A Reactive Plan Language | ||
| SANPLAN | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ India | ||
| SAX APL | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ Array | ⊕ United States | Sharp APL eXtended |
| sceptic 3 | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ United Kingdom | ||
| sceptic 4 | ⊕ 1993 | ↓ ↑ Experimental and other | ⊕ United Kingdom | ||
| SCL | ⊕ 1961 | ↓ ↑ Experimental and other | ⊕ Statistical | ⊕ United States | IBM statistical programming language |
| Seque | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ United States | Experimental language for manipulating sequences | |
| SHOE | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ United States | HTML extension set for the semantic web | |
| SL | ⊕ 1981 | ↓ ↑ Experimental and other | ⊕ Tree | ⊕ United States | Structure Language |
| SMACK | ⊕ 1979 | ↓ ↑ Experimental and other | ⊕ Macroassemblers | ⊕ United States | Macro package for MIL |
| SML | ⊕ 1960 | ↓ ↑ Experimental and other | ⊕ Lazy Evaluation LISPs | ⊕ United States | Symbol language |
| SNAP | ⊕ 1965 | ↓ ↑ Experimental and other | ⊕ Macros | ⊕ United Kingdom | |
| SPS-I | ⊕ 1957 | ↓ ↑ Experimental and other | ⊕ Event scheduling | ⊕ United States | Simulations precursor to SIMSCRIPT |
| Squeak | ⊕ 1985 | ↓ ↑ Experimental and other | ⊕ United States | ||
| SUSL | ⊕ 1981 | ↓ ↑ Experimental and other | ⊕ Tree | ⊕ United States | Selective Updating Structure Language |
| sysLucid | ⊕ 1994 | ↓ ↑ Experimental and other | ⊕ Single-assignment | ⊕ Canada | Systolic functional Lucid |
| TAL | ⊕ 1998 | ↓ ↑ Experimental and other | ⊕ Sweden | Temporal Action Logics | |
| TAO | ⊕ 1995 | ↓ ↑ Experimental and other | ⊕ Italy | Parallel dialect of FORTRAN with some object extensions | |
| TELOS | ⊕ 1989 | ↓ ↑ Experimental and other | ⊕ Canada | ||
| TERMAC | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Matrix | ⊕ United States | Matrix language |
| ThingLab | ⊕ 1979 | ↓ ↑ Experimental and other | ⊕ United States | ||
| TOSS | ⊕ 1969 | ↓ ↑ Experimental and other | ⊕ Modelling | ⊕ United States | |
| Trilogy II | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ Canada | ||
| TSAR | ⊕ 1970 | ↓ ↑ Experimental and other | ⊕ Statistical | ⊕ United States | Statistical system for taped-stored data |
| TSAR | ⊕ 1968 | ↓ ↑ Experimental and other | ⊕ Statistical | ⊕ United States | |
| UNITS | ⊕ 1977 | ↓ ↑ Experimental and other | ⊕ Frame languages | ⊕ United States | Frame language |
| Us | ⊕ 1996 | ↓ ↑ Experimental and other | ⊕ Prototyping | ⊕ United States | Prototyping OOL |
| Valid | ⊕ 1982 | ↓ ↑ Experimental and other | ⊕ Japan | Dataflow language | |
| VIB | ⊕ 1956 | ↓ ↑ Experimental and other | ⊕ Low-level Autocoders | ⊕ United States | Early language for General Motors |
| Viron | ⊕ 1983 | ↓ ↑ Experimental and other | ⊕ United States | Dataflow Programming Environment | |
| VIVA | ⊕ 1990 | ↓ ↑ Experimental and other | ⊕ United States | ||
| VIVID | ⊕ 1987 | ↓ ↑ Experimental and other | ⊕ Goal description | ⊕ United States | |
| W2 | ⊕ 1988 | ↓ ↑ Experimental and other | ⊕ Pascals | ⊕ United States | Systolic array parallel language |
| White Oak Curry | ⊕ 1953 | ↓ ↑ Experimental and other | ⊕ Low-level Autocoders | ⊕ United States | White Oak Curry system |
| XGEN | ⊕ 1977 | ↓ ↑ Experimental and other | ⊕ United States | Code generator generator | |
| X-KLAIM | ⊕ 2000 | ↓ ↑ Experimental and other | ⊕ Italy | Language for organising mobile agents and their interaction strategies | |
| XL | ⊕ 1977 | ↓ ↑ Experimental and other | ⊕ United States | Intermediate language for XGEN |