| ABC | ⊕ 1991 | ↓ ↑ ⊕ Specialised Languages | ⊕ Sound-Performance | ⊕ United Kingdom | |
| Andorra-I | ⊕ 1991 | ↓ ↑ ⊕ Specialised Languages | ⊕ United Kingdom | Bristol U Andorra | |
| CPL | ⊕ 1991 | ↓ ↑ ⊕ Specialised Languages | ⊕ United Kingdom | Categorical Programming Lanugage | |
| Duration Calculus | ⊕ 1991 | ⊕ United Kingdom | |||
| ELSIE | ⊕ 1991 | ⊕ United Kingdom | |||
| Gofer | ⊕ 1991 | ⊕ United Kingdom | |||
| Lucinda | ⊕ 1991 | ⊕ United Kingdom | |||
| Megalog | ⊕ 1991 | ⊕ United Kingdom | |||
| Miracula | ⊕ 1991 | ⊕ United Kingdom | |||
| NUA-Prolog | ⊕ 1991 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ United Kingdom | Extension to the WAM for Parallel Andorra |
| Pascal-Linda | ⊕ 1991 | ↓ ↑ ⊕ Multi-purpose | ⊕ Pascals | ⊕ United Kingdom | |
| Pi Calculus | ⊕ 1991 | ⊕ United Kingdom | |||
| PICT | ⊕ 1991 | ⊕ United Kingdom | |||
| Quintec Prolog | ⊕ 1991 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ United Kingdom | |
| Quintec-Objects | ⊕ 1991 | ⊕ United Kingdom |