This document provides instructions for assembling and disassembling a PC. It lists the necessary components for assembling a computer like the hard drive, memory modules, microprocessor, and power supply. It then outlines 15 steps for assembling the PC, such as installing the power supply, motherboard, memory, disk drives, expansion cards, and connecting cables. Finally, it lists 11 steps for disassembling a PC, which involves removing components in reverse order.