This document provides information on the key components needed to build a computer, including the case, power supply, motherboard, CPU, memory, video card, storage, and optical drive. It explains that the motherboard, CPU, and memory are the three most important components, with the motherboard requiring a compatible CPU socket and chipset. Brief definitions are given for each component, such as the motherboard serving as the main circuit board that connects other components, the CPU performing instructions, and memory storing programs and applications. The document recommends purchasing components from Newegg and concludes by thanking the reader for learning about how to build a computer.