1-Why did the Russian satellite in space worry the Americans?
       because the Americans did not send any satellite and if the Russians 
2-What did the US president do as a result?
        he created ARPA
3-What was ARPA?
       ARPA was an association of the scientists and investigations to put together all their technology efforts
4-What is CERN?
      CERN is europe´s center fer reserch into high-energy physics
5- Who invented the World Wide Web?
       Tim bers-lee
6- What is HTML?
       HTML is the programming language in which all web documents are written
7-What is the difference bettween the internet and the World Wide Web?
       The internet is a network of computers connected by telephone line; the World Wide Web (WWW)