This sheet of stickers includes the five application icons for the on-line social media applications Facebook, Instagram, Messenger, Oculus and WhatsApp. In the lower right corner it reads "Facebook Family".
Facebook - the social media and networking service which launched in February 2004.
Instagram - the photo-sharing application for pictures and videos which launched in October 2010.
Messenger - the instant messaging service which launched in August 2011.
Oculus - the virtual reality software which launched in July 2012.
WhatsApp - the instant messaging service that allows sending of text messages, voice and video calls, images and documents over a cellular phone which launched in January 2009.
This and other objects in this acquisition were collected at the Joint Mathematics Meeting of the American Mathematical Society and the Mathematical Association of America held in January 2017.
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