Facebook, the biggest and most popular social networking site beside Twitter and MySpace, reportedly plans to increase the number of its staff by 50 percent this year. In an interview with Bloomberg last week, Mark Zuckerberg Facebook's founder who also a chief executive said, currently the number of staff employed by the site is 900 people. The company said it had has 250 million users worldwide. In June, Facebook's rival, MySpace, which is managed by Rupert Murdoch's News Corp said it would lay off 30 percent of its staffs in the United States and two-thirds of its staffs around the world. The company was developed with a number of investment by investors from various countries such as Peter Thiel, Accel Partners, Microsoft Corp., and Digital Sky Technologies.