What contribution did Ada?

Answer:
Ada-95 was the first ISO standardized object oriented programming language.

Ada Augusta Countess of Lovelace was the world's first computer programmer, although she never got to run her program as the machine it was written for was never built.

Which Ada were you asking about?
First answer by Eccles-Jordan Trigger. Last edit by Eccles-Jordan Trigger. Contributor trust: 127 [recommend contributor recommended]. Question popularity: 2 [recommend question].