**Computer Science & Engineering (SCS)

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    Text Classification Using Iterative Dichotomiser Algorithm
    (2016-12-19T12:58:17Z) Shruthi, E
    As from the decade the telecommunication technology as changed which as reduce the use of SMS and move to facebook Google messaging services .WhatsApp as be selected as the favourite chat application for text message, photos and group chat. It has become so much popularity because it does not charge for the message and of its cross platform messaging application. WhatsApp as its own advantages like by just having the contact of the person you can send messages ,audio, video to anyone to any corner of this world, hence the application is used by everyone .hence the crime activities is also increasing where the people can send messages to anyone which cannot be tracked. Before forwarding any derogatory messages in WhatsApp we need to be careful because it may lead to serious problems. According to police the person may be arrested if they send any derogatory message unless they prove the ring of message received. Deputy Commissioner of police (cyber) said public use mobile application efficiently for communication, but the derogatory jokes about the celebrities, politics, gender, religion can lead to objection and the case can be filed against last sender under information section act. Recently, WhatsApp application is used for wrong purpose. Criminals use it for the chat and make it difficult for police to track. The criminals use this application to evade call data record (CDR) monitoring. Because the chat message is not monitored by any agency. One of the senior crime officers says that, in dacoit case, the criminal use the app like WhatsApp to convey message to their associate, because the chat message is lost once it is deleted and cannot be retrieved. The application like WhatsApp are internet base, hence it can’t be monitored. Hence according to police, security agency and government need to understand more about the application. When the chat history is deleted from the cell phone it will be stored in phone memory.bt the content will be overwritten when large data is written to the memory. The crime office says the only way to monitor chat message of this application is to invoke the information technology act. Hence if we can have machine learning algorithm implemented in the application and train the application to find suspicious words and predict the message as spam or not spam, the user can have more benefits to control the application so that no one can trap the message and user important message. The bag full of words is given to the algorithm to learn how to decide where the message is spam or not spam, the decision tree algorithm is used which use the decision tree for prediction. The decision tree algorithm iterative dichotomiser (ID3) is very effective algorithm since it use only one decision tree among the space of hypothesis to do the predication.