| ABLE | ⊕ 1981 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ United States | Array-enabled LISP |
| AuditComputer | ⊕ 1981 | ⊕ United States | |||
| Capsule | ⊕ 1981 | ⊕ United States | Modular extensions to Pascal | ||
| CHI | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ Description languages | ⊕ United States | Logic-based system for transformations |
| CLG | ⊕ 1981 | ⊕ United States | Command Language Grammar | ||
| Common LISP | ⊕ 1981 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | Consensus-based common dialect of LISP |
| CONCISE | ⊕ 1981 | ⊕ United States | |||
| Consul | ⊕ 1981 | ⊕ United States | |||
| CPL | ⊕ 1981 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | Primos command language | |
| DIANA | ⊕ 1981 | ⊕ United States | Descriptive Intermediate Attributed Notation for Ada | ||
| DISPEL | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Run-Time Debugging Language | |
| FLAN | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ Vector | ⊕ United States | Vector processing language |
| FOCAL-81 | ⊕ 1981 | ↓ ↑ ⊕ On-Line | ⊕ Generation of JOSS I | ⊕ United States | 1981 version of FOCAL |
| GIRL | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ 2d shape | ⊕ United States | Graphical input language |
| GPL | ⊕ 1981 | ⊕ United States | Graphical Data-driven Programming language | ||
| HIBOL | ⊕ 1981 | ↓ ↑ ⊕ Business Data Processing | ⊕ United States | High Level COBOL | |
| HLL | ⊕ 1981 | ⊕ United States | |||
| IDMS | ⊕ 1981 | ↓ ↑ ⊕ Experimental and other | ⊕ 2d shape | ⊕ United States | Pictorial query language |
| IMPS | ⊕ 1981 | ↓ ↑ ⊕ Multi-purpose | ⊕ Pascals | ⊕ United States | Pascal module-capable dialect |
| Interlisp-VAX | ⊕ 1981 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | |
| IPSS/Rel | ⊕ 1981 | ⊕ 2d shape | ⊕ United States | Simulation language | |
| Karel | ⊕ 1981 | ⊕ United States | |||
| KBS | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ Event scheduling | ⊕ United States | Frames-based simulation language |
| LOGO-S | ⊕ 1981 | ↓ ↑ ⊕ String and List Processing | ⊕ United States | Proposed standard LOGO | |
| LZ | ⊕ 1981 | ⊕ United States | |||
| microAPL | ⊕ 1981 | ↓ ↑ ⊕ Experimental and other | ⊕ Array | ⊕ United States | Microprogramming APL Dialect |
| Micro-Dynamo | ⊕ 1981 | ⊕ United States | |||
| micro-PRL | ⊕ 1981 | ⊕ United States | |||
| microTAL | ⊕ 1981 | ⊕ United States | |||
| Mock Lisp | ⊕ 1981 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States | |
| OMEGA | ⊕ 1981 | ⊕ United States | |||
| OPS6 | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | Production system |
| PDL/Ada | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Program design language based on Ada | |
| PIDGIN | ⊕ 1981 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | CPM/M systems programming language | |
| PSP | ⊕ 1981 | ⊕ United States | |||
| RATMAC | ⊕ 1981 | ⊕ United States | |||
| ROBART 1 | ⊕ 1981 | ↓ ↑ ⊕ On-Line | ⊕ CAI languages | ⊕ United States | Dialogue grammar based on BNF |
| ROSIE | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | English-based AI language | |
| SB-Mod | ⊕ 1981 | ⊕ United States | |||
| SB-MODULA | ⊕ 1981 | ↓ ↑ ⊕ Multi-purpose | ⊕ Pascals | ⊕ United States | Development extensions to MODULA |
| SL | ⊕ 1981 | ↓ ↑ ⊕ Experimental and other | ⊕ Tree | ⊕ United States | Structure Language |
| SMP | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ Arithmetic | ⊕ United States | |
| SQURL | ⊕ 1981 | ⊕ United States | |||
| SRL | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ Frame languages | ⊕ United States | Schema Representation language |
| STREX | ⊕ 1981 | ↓ ↑ ⊕ String and List Processing | ⊕ United States | String Extended FORTRAN | |
| SUSL | ⊕ 1981 | ↓ ↑ ⊕ Experimental and other | ⊕ Tree | ⊕ United States | Selective Updating Structure Language |
| TABLET | ⊕ 1981 | ↓ ↑ ⊕ Business Data Processing | ⊕ United States | ||
| TESI | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | APL for Pictorial Analysis | |
| TINCMP | ⊕ 1981 | ↓ ↑ ⊕ String and List Processing | ⊕ United States | M4 Macro set for PIDGIN | |
| TSL | ⊕ 1981 | ⊕ United States | |||
| UNBASIC | ⊕ 1981 | ⊕ United States | |||
| UniSolid | ⊕ 1981 | ⊕ United States | |||
| URL | ⊕ 1981 | ⊕ United States | |||
| V | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | ⊕ Definition languages | ⊕ United States | |
| Y | ⊕ 1981 | ↓ ↑ ⊕ String and List Processing | ⊕ United States |