Vint Cerf is known as the "Father of the Internet" for his role in developing TCP/IP. Facebook was founded by Mark Zuckerberg in 2004 and has acquired companies like WhatsApp and Instagram. Twitter was co-founded by Jack Dorsey in 2006 as a microblogging service allowing users to post and read short 140-character messages called tweets. Google was founded in 1998 by Larry Page and Sergey Brin and has acquired companies including YouTube.