GSP | ⊕ 1968 | ↓ ↑ ⊕ Specialised Languages | ⊕ Plan languages | ⊕ United States | Space planning language |
PAL | ⊕ 1968 | ↓ ↑ ⊕ Specialised Languages | ⊕ Plan languages | ⊕ United States | |
PLAN | ⊕ 1968 | ↓ ↑ ⊕ Specialised Languages | ⊕ Plan languages | ⊕ United States |