 Unfortunately, Facebook is additionally widely used to sway public opinion on political and economic issues. Moreover, between 2014 and 2016 groups of people with political agendas used the site to spread false information. Millions of people opened accounts under www.TechnicalPDF.com pseudonyms. And it is widely believed that the Russian government was actively involved in using Facebook to sway public opinion with false claims made under fake identities. Facebook's European headquarters is in Dublin, Ireland where it supports the company's growing number of international sites. Facebook is currently working to establish units in the developing world, including sub-Saharan Africa. In a similar manner to other social networks, Facebook derives its revenue from advertising on its network. Its ad revenue grew to $11.69 billion in the first quarter of 2018 alone. In its effort to attract younger subscribers, Facebook has purchased companies and developed new services and apps. Many of these are geared to the younger people Facebook is hoping to win back to its sites to increase its advertising revenue. Advertisers pay higher rates for ads aimed at younger age groups. Its subsidiaries and apps include the following: Instagram: A social networking app with 800 million monthly users where people share videos and photos. Messaging between users enables multiple video and photo posts sequentially. The multiple posts are available for only 24 hours. The site has photo- and video- formatted ads that are labeled as advertising. Messenger: A chat app that supports mobile voice and texting. Users are not required to have a Facebook account. Oculus VR: A headset that supports virtual reality. Virtual reality is a technology that supports immersive reality where people playing video games feel as though they are actually participating in the game. Samsung smartphones can be integrated into Oculus VR. A division of Oculus develops video games for Oculus virtual reality headsets. WhatsApp: A messaging app that supports texting a