1. Introduction to Data Science and Machine Learning Algorithms.- 2. Identifying Indicators of Global Financial Crisis with Fuzzy Logic and Data Science: A Comparative Analysis between Developing and Developed Economies.- 3. Determining the Ways to Increase Economic Growth of Developing and Developed Economies: An Application with Data Mining and Fuzzy TOPSIS.- 4. Profitability Prediction of Turkish Banking Industry: A Comparative Analysis with Data Science and Fuzzy ANP.- 5. The Influence of the Politicians on Macroeconomic Performance: An Analysis of Donald Trump’s Tweets.- 6. How is the Stock Exchange Index Affected by the Disclosures of Politicians?.- 7. Defining the Significant Factors of Currency Exchange Rate Risk by Considering Text Mining and Fuzzy AHP.- 8. Emerging Applications and the Future of Data Science.