Simula, invented in the late 1960s by Nygaard and Dahl as a superset of Algol 60, was the first language designed to support object-oriented programming.
C, an early systems programming language, was developed by Dennis Ritchie and Ken Thompson at Bell Labs between 1969 and 1973.
Smalltalk, mid-1970s, provided a complete ground-up design of an object-oriented language.
Prolog, designed in 1972 by Colmerauer, Roussel, and Kowalski, was the first logic programming language.
ML built a polymorphic type system, invented by Robin Milner in 1973, on top of Lisp, pioneering statically typed functional programming languages.