| A# | ⊕ 1990 | ⊕ Algebraic | ⊕ Japan | Algebraic programming language | |
| ACL | ⊕ 1990 | ⊕ Motion-oriented | ⊕ Japan | ||
| ADETRAN | ⊕ 1990 | ⊕ Japan | |||
| ANDOR | ⊕ 1990 | ⊕ Horn clause | ⊕ Japan | AND-OR Prolog | |
| ANDOR-II | ⊕ 1990 | ⊕ Horn clause | ⊕ Japan | AND-OR Prolog | |
| AOPL | ⊕ 1990 | ⊕ Japan | |||
| CESP | ⊕ 1990 | ⊕ Japan | |||
| COB | ⊕ 1990 | ⊕ Japan | C Objects | ||
| DIAL/M | ⊕ 1990 | ⊕ Japan | |||
| FACOM-R | ⊕ 1990 | ↓ ↑ ⊕ Specialised Languages | ⊕ Japan | PL/R on a FACOM minicomputer | |
| P/I | ⊕ 1990 | ⊕ Japan | |||
| PL/8 | ⊕ 1990 | ⊕ Japan | |||
| PL/R | ⊕ 1990 | ⊕ Japan | |||
| PROTO-E | ⊕ 1990 | ⊕ Japan | |||
| Real-Time C++ | ⊕ 1990 | ⊕ Japan | Real-time extension of C++. | ||
| WORLDS | ⊕ 1990 | ⊕ Japan |