Among other very notable achievements as part of a team at Xerox working on Alto
he established the reference design of the modern networked PC with GUI as we know it that everyone uses today.
Java evolved from a programming language he wrote. He established the ability for remotely connected computers to communicate with each other and share data for the US military from which network designs the world wide web eventually evolved.
Sir Tim Berners-Lee subsequently invented html language and the common traffic protocols which leverage those systems to provide the internet we use today.