POS tagging is assigning a label or a tag to a word in a sentence according to its parts-of-speech category. POS Tagging is a process that attaches each word in a sentence with a suitable tag from a given set of tags.POS tagging can be both manual as well as automatic .Manual tagging though more accurate, is a time consuming process. Since, large scale quality annotated data is required for the technological development of Indian languages.POS tagging is very much required to reduce the syntactic ambiguity. So far, various automatic tagger have been developed in India and outside for Indian languages, using linguistic rules, stochastic and hybrid models. There are different freely available POS taggers like Stanford POS Tagger.