This book deals with some basic thermodynamic & transport properties of fluids & solids that are of interest in engineering applications. Various notions about the basic structure of matter, fundamental concepts of our physical world & the conditions of equilibrium between different phases of matter are discussed in the first part of the book. The macroscopic properties of fluids & solids are explained in the latter part. The book is written for first-year university students in engineering. Therefore, simple derivations & clear explanations have been preferred to detailed theoretical treatment. Illustrative problems, spaced throughout the text, demonstrate the application of various concepts & facilitate a better understanding of the theory. The text provides a sound first treatment of many properties of fluids & solids of interest in all the engineering disciplines.