Introduction to Electronics focuses on the study of electronics and electronic devices. Composed of 14 chapters, the book starts with discussions on dc circuits, including resistance, voltmeter, ammeter, galvanometer, internal resistance, and positive and negative currents. This topic is followed by discussions on ac circuits, particularly addressing voltage and current, average power, resistive load, complex plane, and parallel circuits. Discussions also focus on filters and tuned circuits, diodes, and power supplies. Particularly given attention are the processes, diagrams, and analyses that are involved in the operations of filters and capacitors. The functions of triodes, pentodes, oscillators, transistors, and voltage and power amplifiers are also discussed. The discussions are supported by diagrams, numerical analyses and representations, and experiments. Inter-electrode capacitance, phase splitters, impedance matching, equivalent circuits, and four terminal networks are covered as well. This text also mentions the role of an oscilloscope in maintaining regulated power supply. The calculations for direct and alternating currents are also given emphasis. This book is a good source of data for those interested in electronics.