In this paper we present automated text classification in text mining that is gaining greater relevance in various fields every day. Text mining primarily focuses on developing text classification systems able to automatically classify huge volume of documents, comprising of unstructured and semi structured data. The process of retrieval, classification and summarization simplifies extract of information by the user. The finding of the ideal text classifier, feature generator and distinct dominant technique of feature selection leading all other previous research has received attention from researchers of diverse areas as information retrieval, machine learning and the theory of algorithms. To automatically classify and discover patterns from the different types of the documents [1], techniques like Machine Learning, Natural Language Processing (NLP) and Data Mining are applied together. In this paper we review some effective feature selection researches and show the results in a table form.