| A+ | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Array | ⊕ United States | Dialect of APL used at Morgan-Stanley |
| ADS | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ 2d shape | ⊕ United States | Macro language for AutoCAD |
| ALGERNON | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Frame languages | ⊕ United States | |
| ART-IM | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | ART with CLIPS features |
| AVA | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Adas | ⊕ United States | Verifiable Ada |
| bash | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Command systems | ⊕ United States | Command language for UNIX |
| behavior | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Robotics | ⊕ United States | Robotics control language |
| CLIPS/R2 | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | Rete/2 CLIPS |
| Cmusic | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Sound-Synthesis | ⊕ United States | Musical composition language |
| condela | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Germany | Neural Network Definition Language. | |
| FACOM-R | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Japan | PL/R on a FACOM minicomputer | |
| FLEX | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Canada | Faster LEX | |
| Framework | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | CMU Frame language | |
| Gabriel | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Graphical DSP simulation language | |
| Garnet | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Interface and windowing | ⊕ United States | High level OO language with interface capabilities |
| Genie | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ 2d shape | ⊕ United States | Mentor's electronics CAD language |
| Ghostscript | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ 2d shape | ⊕ United States | Interpreter for postscript |
| Inform 2 | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Robotics | ⊕ United States | Motoman robotics language |
| J | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Array | ⊕ United States | Iverson's second (simplified, ascii, functional) array-based language |
| KAPPA | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Frame languages | ⊕ United States | Frame language |
| KB | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Frame languages | ⊕ United States | |
| LO | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ United Kingdom | Linear Objects | |
| Mast | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Expression oriented | ⊕ United Kingdom | Continuous simulations language |
| Maude | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | ||
| microCRL | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Netherlands | Algebraic specification | |
| Muse | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Horn clause | ⊕ International | Or-Parallel Prolog |
| NTF | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Frame languages | ⊕ Germany | |
| Object-CHILL | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Pascals | ⊕ International | Proposed object-oriented extension of CHILL |
| OO-CHILL | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Pascals | ⊕ International | Proposed object-oriented extension to CHILL |
| PCLIPS | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | Parallel CLIPS |
| POLROB | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Poland | POL for robotic arms | |
| Prolog-D-Linda | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Horn clause | ⊕ Australia | Linda style Prolog |
| RAND-ABEL | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Decision tables | ⊕ United States | Simulation language for warfare |
| RDL/C | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ France | |
| Resampling Stats | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Columnar sheets | ⊕ United States | Resmaplong capability Omnitab |
| RHET | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Frame languages | ⊕ United States | |
| SAL | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ United Kingdom | SPARK Annotation Language | |
| SIL | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | Simulation Language | ||
| Skill | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ 2d shape | ⊕ United States | Cadence |
| SRL | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Predicate | ⊕ United States | Logic programming language |
| Super Syntax | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ 2d shape | ⊕ United States | CAD Hyperscripting language |
| TBAG | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Animation | ⊕ United States | Interactive animation language as extension of C++ |
| Tcl | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Tool Command Language | |
| TeX 3 | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Text formatting language | |
| Zinc | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ France |