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As an important supplement of this chapter, we have included in the following lines the meaning of some of the most used terms used in the world network of networks: the Internet.  Al Artificial Intelligence: Part of the Computer Science that studies the simulation of intelligence Access Provider: Server center that provides logical access to Internet, working as  gateway between the final user and Internet. ACK (Acknowledgment): Response signal ADSL (Asymmetric Digital Subscriber Line): Asymmetric system of data transmission over conventional telephone lines. There are working systems that reach speeds…


Reported Speech also called Indirect Speech or indirect discourse is a means of expressing the content of statements, questions or other utterances, without quoting them explicitly as is done in direct speech. It is used to communicate what someone else said, think or believe but without using the exact words. A few changes are necessary; often a pronoun has to be changed and the verb is usually moved back a tense, where possible. For example, He said “I’m coming” is direct speech, whereas He said he was coming is indirect speech.…