It's XML's birthday today - the very first XML 1.0 Recommendation has been published 10 February 1998 - 7 years ago. That's a mature technology which you can find everywhere, because XML just works. And it's still extremely hot!
Sincere congratulations to the XML 1.0 fathers: Tim Bray, Jean Paoli and C. M. Sperberg-McQueen!
Here is another XML history related article "Happy Birthday, XML!" (2003) by Dave Hollander and C. M. Sperberg-McQueen (the image above is from the article, © W3C).
Yep, you are right. I know there were more fathers, I just listed Editors of the Recommendation.
Jean Paoli, Tim Bray and Jon Bosak are considered fathers of XML. I noticed you did not mention Jon.