This document provides an overview of common electrical and electronic components used in circuits. It begins by explaining basic electricity concepts like current, voltage, resistance and power. It then describes different component types including passive components like resistors, capacitors, and inductors, as well as active components like diodes, transistors, integrated circuits and more. Specific components are defined, such as resistors having fixed or variable values, different types of transistors including BJTs and FETs, and meters for measuring current, voltage, resistance and other properties. Videos are included for additional learning.