mark zuckerberg

Waist high portrait of man in his twenties, looking into the camera and gesturing with both hands, wearing a black pullover shirt that says "The North Face" and wearing identification on a white band hanging from his neck

Zuckerberg at World Economic Forum, Davos, Switzerland (January 2009)
On May 24, 2007, Zuckerberg announced Facebook Platform, a development platform for programmers to create social applications within Facebook. Within weeks, many applications had been built and some already had millions of users. It grew to more than 800,000 developers around the world building applications for Facebook Platform.[citation needed]