| Acore | ⊕ 1988 | ⊕ United States | Concurrent OO Language | ||
| ACOS | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | BBS language | |
| Ada 9X | ⊕ 1988 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | Review and update of Ada 83 | |
| Ada/Ed | ⊕ 1988 | ⊕ United States | |||
| AdLog | ⊕ 1988 | ⊕ United States | |||
| ALEPH | ⊕ 1988 | ⊕ United States | |||
| Alltalk | ⊕ 1988 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | Smalltalk with persistency | |
| ALPS | ⊕ 1988 | ⊕ United States | |||
| Amber | ⊕ 1988 | ⊕ United States | |||
| APL*PLUS II | ⊕ 1988 | ⊕ United States | |||
| ARLA | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ Robotics | ⊕ United States | ABBA robotics language |
| AUTOLEV | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ Modelling | ⊕ United States | Mechanical systems language |
| Butterfly Portable Standard LISP | ⊕ 1988 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | Portable Standard LISP on BBN Butterfly |
| C5 | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | C based version of OPS-5 |
| CASE | ⊕ 1988 | ⊕ United States | MOdule interconnection language | ||
| CCL | ⊕ 1988 | ⊕ United States | |||
| Cecil | ⊕ 1988 | ⊕ United States | |||
| CLOS | ⊕ 1988 | ⊕ United States | Common LISP Object System | ||
| CM Fortran | ⊕ 1988 | ↓ ↑ ⊕ Numerical Scientific | ⊕ United States | Fortran for the CM | |
| Coherent Parallel C | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | ||
| Concurrent C++ | ⊕ 1988 | ⊕ United States | Concurrent C with classes | ||
| ConIcon | ⊕ 1988 | ⊕ United States | |||
| ConMan | ⊕ 1988 | ⊕ United States | Visual Programming Language | ||
| C-Pilot | ⊕ 1988 | ⊕ United States | Computer aided instruction language | ||
| CST | ⊕ 1988 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | Concurrent OO Language | |
| CYCL | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ Frame languages | ⊕ United States | Frame language for CYC |
| Daisy | ⊕ 1988 | ⊕ United States | |||
| DEBL | ⊕ 1988 | ⊕ United States | |||
| DFORMAT | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Language for depicting data structures | |
| d-Prolog | ⊕ 1988 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ United States | Defeasible Prolog |
| DRAG | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | PIC preprocessor language for directed graphs | |
| Eager | ⊕ 1988 | ⊕ United States | |||
| FIDIL | ⊕ 1988 | ⊕ United States | Array based language with domains and regions as first class elements | ||
| FORGE | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ CAI languages | ⊕ United States | Computer aided instruction language |
| Forsythe | ⊕ 1988 | ⊕ United States | |||
| FoxBASE+ | ⊕ 1988 | ⊕ United States | |||
| FrameKit | ⊕ 1988 | ⊕ United States | |||
| FRAPPE | ⊕ 1988 | ⊕ Frame languages | ⊕ United States | ||
| G | ⊕ 1988 | ⊕ United States | Multiparadigm Language | ||
| G | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ Animation | ⊕ United States | Runtime graphics language for GRASP |
| GAMS | ⊕ 1988 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ United States | General Algebraic Modeling System |
| GARP | ⊕ 1988 | ↓ ↑ ⊕ Experimental and other | ⊕ Graph | ⊕ United States | Graph-based hybrid concurrent OO language |
| GFA BASIC | ⊕ 1988 | ⊕ United States | |||
| GL | ⊕ 1988 | ⊕ United States | |||
| Hoselton FORTH | ⊕ 1988 | ⊕ United States | |||
| IDF | ⊕ 1988 | ⊕ United States | |||
| InnovAda | ⊕ 1988 | ⊕ United States | |||
| Interpress | ⊕ 1988 | ⊕ United States | |||
| ISWYM | ⊕ 1988 | ⊕ United States | |||
| KFX | ⊕ 1988 | ⊕ United States | |||
| Kodiyak | ⊕ 1988 | ⊕ United States | |||
| lambda-Prolog | ⊕ 1988 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ United States | |
| LAMINA | ⊕ 1988 | ⊕ United States | |||
| Logical Objects | ⊕ 1988 | ⊕ United States | |||
| Mathematica | ⊕ 1988 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ United States | |
| MetaH | ⊕ 1988 | ⊕ United States | |||
| METAL | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | BBS scripting language | |
| MOA | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | parallel language | |
| MT Icon | ⊕ 1988 | ⊕ United States | Multhreaded Icon | ||
| Newsqueak | ⊕ 1988 | ↓ ↑ ⊕ On-Line | ⊕ Interface and windowing | ⊕ United States | Windowing/mousing language |
| OBJ3 | ⊕ 1988 | ⊕ United States | |||
| OCTAVE | ⊕ 1988 | ↓ ↑ ⊕ Numerical Scientific | ⊕ United States | ||
| OPSJ | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | Production system |
| Otter | ⊕ 1988 | ⊕ United States | |||
| PAL | ⊕ 1988 | ↓ ↑ ⊕ Business Data Processing | ⊕ United States | Paradox Application Language | |
| PASCAL/MT+ | ⊕ 1988 | ↓ ↑ ⊕ Multi-purpose | ⊕ Pascals | ⊕ United States | |
| PBasic | ⊕ 1988 | ↓ ↑ ⊕ Numerical Scientific | ⊕ United States | ||
| Peridot | ⊕ 1988 | ⊕ United States | |||
| PIE | ⊕ 1988 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Visual language | |
| PK/C++ | ⊕ 1988 | ⊕ United States | |||
| Plane Lucid | ⊕ 1988 | ↓ ↑ ⊕ Business Data Processing | ⊕ 3D Spreadsheets | ⊕ United States | 3d spreadsheet language |
| QLISP | ⊕ 1988 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | Parallel LISP |
| Quicksilver | ⊕ 1988 | ⊕ United States | xBase compiler | ||
| RASP | ⊕ 1988 | ⊕ United States | |||
| RefLisp | ⊕ 1988 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | Reference Counting LISP |
| RLISP 88 | ⊕ 1988 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | |
| RPL | ⊕ 1988 | ↓ ↑ ⊕ Business Data Processing | ⊕ RETE and production | ⊕ United States | The Relational Production Language |
| Ruby | ⊕ 1988 | ⊕ United States | |||
| SDL | ⊕ 1988 | ↓ ↑ ⊕ Business Data Processing | ⊕ United States | Shared Dataspace Language | |
| Seque | ⊕ 1988 | ↓ ↑ ⊕ Experimental and other | ⊕ United States | Experimental language for manipulating sequences | |
| SR | ⊕ 1988 | ⊕ United States | Synchronizing Resources - concurrent programming language | ||
| Stepper | ⊕ 1988 | ⊕ United States | |||
| Superpilot | ⊕ 1988 | ↓ ↑ ⊕ String and List Processing | ⊕ CAI languages | ⊕ United States | Computer aided instruction language |
| Terse | ⊕ 1988 | ⊕ United States | |||
| TS | ⊕ 1988 | ⊕ United States | Typed Smalltalk | ||
| Unity | ⊕ 1988 | ⊕ United States | |||
| VISUAL BASIC | ⊕ 1988 | ⊕ United States | |||
| W2 | ⊕ 1988 | ↓ ↑ ⊕ Experimental and other | ⊕ Pascals | ⊕ United States | Systolic array parallel language |
| Zeitgeist | ⊕ 1988 | ⊕ United States | Object-oriented data base programming language |