when was facebook first opened to the public
History of Facebook On October 1, 2005, Facebook expanded to twenty-one universities in the United Kingdom and others around the world. Facebook launched a high school version in September 2005, which Zuckerberg called the next logical step.[40] At that time, high school networks required an invitation to join.[41] Facebook later expanded membership eligibility to employees of several companies, including Apple Inc. and Microsoft.[42] On December 11, 2005, universities in Australia and New Zealand were added to the Facebook network, bringing its size to 2,000+ colleges and 25,000 + high schools throughout the United States, Canada, Mexico, the United Kingdom, Australia, New Zealand, and Ireland. Facebook was then opened on September 26, 2006 to everyone aged 13 and older with a valid e-mail address.[6][7]
Sheryl Sandberg Sheryl Kara Sandberg (born August 28, 1969)[4] is an American technology executive, activist, and author. She is the chief operating officer (COO) of Facebook and founder of Leanin.org. In June 2012, she was elected to the board of directors by the existing board members,[5] becoming the first woman to serve on Facebook's board. Before she joined Facebook as its COO, Sandberg was vice president of global online sales and operations at Google, and was involved in launching Google's philanthropic arm Google.org. Before Google, Sandberg served as chief of staff for United States Secretary of the Treasury Lawrence Summers.