This book is an introduction to Big Data. It expresses useful techniques to assemble, maintain reliable, scalable and distributed systems with Big Data. It enlightens the perception of NoSql and Map reduce in great detail. R is a programming language mainly used for statistical analysis, graphics representation and reporting purposes. This book distributes great outcomes when read with discipline. Beginners will find it hard to understand at first. It can be used as a text-cum-reference book by students of BE, BTech, MCA, BCA, M.Sc. and B.Sc. courses in several Universities.