John Gruber (born 1973) is a writer from the greater Philadelphia, Pennsylvania area of the United States. Gruber received his Bachelor of Science in computer science from Drexel University. He worked for Bare Bones Software from 2000 to 2002 and Joyent from 2005 to 2006. His main project is Daring Fireball, a technology blog that has become his full-time job. His side projects include Markdown, a lightweight markup language, and a podcast called The Talk Show that he hosts on the Mule Radio Syndicate network. He previously co-hosted "The Talk Show" with Dan Benjamin on the 5by5 Radio Network. John Gruber has increasingly appeared as a conference speaker, starting in the US but going worldwide in recent years. His presentations focus on a subset of topics that he covers on Daring Fireball, mainly the intersection of Apple Inc., Movies and the creative process.