Transistors covers the main thread of transistor development. This book is organized into 2 parts encompassing 19, and starts with an overview of the semi-conductor physics pertinent to the understanding of transistors, as well as features and applications of the point contact devices and junction devices. The subsequent part deals with the modulation of conductance of thin films of conductors by surface charges, the metal-semi conductor, and the semi-conductor triode. These topics are followed by discussions on the nature of the forward current, physical principles in transistor, the hole injection in transistor, and the double-surface transistor in which the emitter and collector contacts bear on the two opposite faces of a thin wedge or slab of semiconductor. Other papers describe the effects of electrical forming on the rectifying barrier, the junction in semiconductors and transistors, the theory of Alpha for diffused junction transistors, and a high frequency diffused transistor. The last chapters consider unipolar, analog, and thin film transistors This book will be of value to physicists and researchers in the allied fields.