Chapter1. An Offline-Online Visual Framework for Clustering Memes in Social Media.- Chapter2. A System for Email Recipient Prediction.- Chapter3. A Credibility Assessment Model for Online Social Network Content.- Chapter4. Web Search Engine based Representation for Arabic Tweets Categorization.- Chapter5. Sentiment Trends and Classifying Stocks using P-Trees.- Chapter6. Mining Community Structure with Node Embeddings.- Chapter7. A LexDFS-based Approach on finding compact communities.- Chapter8. Computational Data Sciences and Regulation of Banking and Financial Services.- Chapter9. Frequent and Non-Frequent Sequential Itemsets Detection