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                            Dial-up conection  Dial-up Internet access is a form of Internet  access that uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telephone line. The user's computer or router uses an attached modem to encode and decode information into and from audio frequency signals, respectively. In 1979, Tom Truscott and Steve Bellovin, graduate students for Duke University, created an early predecessor to dial-up Internet access called the USENET. The USENET was a UNIX based system that used a dial-up connection to transfer data through telephone modems.[1] Dial-up Internet has been around since the 1980s via public providers such as NSFNET-linked universities and was first offered commercially in July 1992 by Sprint.[2] Despite losing ground to broadband since...

                                                  AMEZON FORERST     he  Amazon rainforest  ( Portuguese :  Floresta Amazônica  or  Amazônia ;  Spanish :  Selva Amazónica ,  Amazonía  or usually  Amazonia ;  French :  Forêt  amazonienne ;  Dutch :  Amazoneregenwoud ), also known in English as  Amazonia  or the  Amazon Jungle , is a  moist broadleaf forest  in the  Amazon biome  that covers most of the  Amazon basin  of South America. This basin encompasses 7,000,000 km 2  (2,700,000 sq mi), of which 5,500,000 km 2 (2,100,000 sq mi) are covered by the rainforest. This region includes territory belonging to nine nations. The majority of the forest is contained  within Brazil , with 60% of...