the study of text in relation to social context),Machine Translation ( Machine translation refers to automatic translation of text from one language to another),Morphological Segmentation ( Morphological segmentation refers to breaking words into individual meaning-bearing morphemes), Named Entity Recognition ( Named entity recognition (NER) is used for information extraction to recognized name entities and then classify them to different classes), Optical Character Recognition ( Optical character recognition (OCR) is used for automatic text recognition by translating printed and handwritten text into machine-readable format), Part Of Speech Tagging ( Part of speech tagging describes a sentence, determines the part of speech for each word) etc. Few of the researched tasks of NLP are Automatic Summarization ( Automatic summarization produces an understandable summary of a set of text and provides summaries or detailed information of text of a known type), Co-Reference Resolution ( Co-reference resolution refers to a sentence or larger set of text that determines all words which refer to the same object), Discourse Analysis ( Discourse analysis refers to the task of identifying the discourse structure of connected text i.e. The field of NLP is related with different theories and techniques that deal with the problem of natural language of communicating with the computers. One of the most interesting aspects of NLP is that it adds up to the knowledge of human language. In the existing literature, most of the work in NLP is conducted by computer scientists while various other professionals have also shown interest such as linguistics, psychologists, and philosophers etc. The first objective of this paper is to give insights of the various important terminologies of NLP and NLG. Further, Natural Language Generation (NLG) is the process of producing phrases, sentences and paragraphs that are meaningful from an internal representation. Noah Chomsky, one of the first linguists of twelfth century that started syntactic theories, marked a unique position in the field of theoretical linguistics because he revolutionized the area of syntax (Chomsky, 1965). Linguistics is the science of language which includes Phonology that refers to sound, Morphology word formation, Syntax sentence structure, Semantics syntax and Pragmatics which refers to understanding. Natural Language Understanding or Linguistics and Natural Language Generation which evolves the task to understand and generate the text. It came into existence to ease the user’s work and to satisfy the wish to communicate with the computer in natural language, and can be classified into two parts i.e. In fact, NLP is a tract of Artificial Intelligence and Linguistics, devoted to make computers understand the statements or words written in human languages. Since all the users may not be well-versed in machine specific language, Natural Language Processing (NLP) caters those users who do not have enough time to learn new languages or get perfection in it. A language can be defined as a set of rules or set of symbols where symbols are combined and used for conveying information or broadcasting the information.

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