| SPI | ⊕ 1987 | ↓ ↑ ⊕ Specialised Languages | ⊕ Interface and windowing | ⊕ United Kingdom | Interface definition language based around CSP and me-too |
| WOOL | ⊕ 1987 | ↓ ↑ ⊕ Specialised Languages | ⊕ Interface and windowing | ⊕ France | OO window-manager language from INRIA |