Computers – mechanical Difference Engine (1822) by Charles Babbage. Other engines followed, and programmed by Ada Lovelace.
Electronic Computer – The ENIAC was completed in 1945.
Internet – January 1, 1983 is considered the official birthday of the Internet.
World Wide Web – as a way to easily share and link information using the Internet. 1989. I consider the creation of HTML as pretty much synonymous with creation of the WWW.