All the chapters included in this book are the selected/accepted papers for presentation after peer review of special session 'Computer Science & IT' of 2nd International Research Conference on "Business Process Re-engineering for Sustainability & Climate Change: Issues & Perspectives" held on 26th Feb 2017. Content of the Book: Chapter 1: Neoteric Energy Efficient ZRP Based Routing Approach. Chapter 2: Application of Clustering Techniques to Determine the Improvement in Water Quality of 17 Selected Indian Rivers. Chapter 3: KURIR: ANDROID BASED SOCIAL MESSAGING APPLICATION. Chapter 4: Sudoku Solver and Analyzer. Chapter 5: SSCE: Shape Size Color Estimation of Object using OpenCV. Chapter 6: Snake Bite Detection And Treatment System. Chapter 7: Voice Transmission through WiFi.