H ?

1970s languages ↑
High Cold War ↑
Fourth generation ↑

Explore languages for Japan and for year 1977

OLM-1    ⊕ 1977     ⊕ Japan    
SYSL    ⊕ 1977     ⊕ Japan    
Westran    ⊕ 1977     ⊕ Japan   Well structured fortran