<P> The Facebook Platform provides a set of APIs and tools which enable third - party developers to integrate with the "open graph", whether through applications on Facebook.com or external websites and devices . Launched on May 24, 2007, Facebook Platform has evolved from enabling development just on Facebook.com to one also supporting integration across the web and devices . </P> <P> Facebook Platform Statistics as of May 2010: </P> <Ul> <Li> More than one million developers and entrepreneurs from more than 180 countries </Li> <Li> More than 550,000 active applications currently on Facebook Platform </Li> <Li> Every month, more than 70% of Facebook users engage with Platform applications </Li> <Li> More than 250,000 websites have integrated with Facebook Platform </Li> <Li> More than 100 million Facebook users engage with Facebook on external websites every month </Li> </Ul> <Li> More than one million developers and entrepreneurs from more than 180 countries </Li>

Which of the following attributes are features of the social networking service facebook