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Some of the common social networking sites are:
                Facebook: It was founded  by Mark  Zuckerberg  in 2004. The

                user can add friends and interact by posting comments, pictures
                and videos.


                                 Instagram: It is a photo and video sharing social networking site
                                 now owned by Facebook, originally created by Kevin Systrom

                                 and Mike Krieger in 2010.


                X: It is a social networking site where users post and interact
                with messages known as "tweets". It was launched in 2006.


                                        YouTube: It is a video sharing site where users can watch,

                                        share, like, download and upload videos. It was created in
                                        2005 but Google bought it in 2006.

                WhatsApp: It is an instant messaging service that allows you to
                send messages, pictures and videos and even voice recordings
                over the Internet. It was launched in 2009 and is now owned by
                Facebook. It is more popular as an app.

            Other Uses

            Many services are now provided on the Internet such as online banking, job seeking,
            online education,  online ticket booking, hotel reservations and online storage.
            Often, these services are either not available offline or cost more.


                REQUIREMENTS TO CONNECT TO INTERNET

            The things required for having an Internet connection are:

                Computer System: It is an integrated system with all the

                different  types of input,  output,  processing and  storage
                devices.


                                               Telephone and Cable Lines: These help in

                                              establishing a link between the different computers
                                              and the servers.



                Modem: It stands for Modulator-Demodulator. Modem
                transfers digital information over telephone lines.




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