This document provides descriptions of the key components used to install a desktop computer. It describes the power supply, motherboard, CPU, RAM, fans, hard disk drive, optical drive, floppy drive, video adapter, network interface card, cables (PATA, SATA, floppy), case panels, monitor, keyboard, mouse, USB ports, Ethernet port, wireless antenna, and power cord. Photos accompany some components to illustrate their appearance and location within the desktop case.