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    Barr and Feigenbaum in 1981 defined AI as “Artificial Intelligence (AI) is the part of computer
                     science concerned with  designing intelligent computer systems, that is, systems that exhibit
                     characteristics  we  associate  with  intelligence  in  human  behaviour—understanding  language,
                     learning, reasoning, solving problems, and so on.”

                             Domains of AI

                     There are different approaches or domains to achieve Artificial Intelligence. There are various
                     methods through which we can develop artificially intelligent systems. Let us learn about these
                     domains.

                              Natural Language
                                  Processing                         Big Data                     Computer Vision

                     Natural Language Processing (NLP)
                     This is a subfield of AI which helps in communication between human and computer in natural
                     language. It enables a computer to read and understand data by mimicking human natural
                     language.

                     This subfield of AI is used for a variety of tasks such as email filters. A lot of people receive a lot
                     emails which are useless. NLP checks the sender of the email and categorises the mails as spam
                     or junk. NLP also finds its use in the auto complete and spell check feature of word processors.
                     NLP also proves to be quite useful in voice text messaging and virtual assistants.

                                                                                                       Domains of AI   93

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