This document provides definitions for common computer hardware, software, and networking terms. It explains that RAM is used for temporary storage, the CPU carries out instructions, and graphics processors render shapes and colors. Storage media saves files permanently unlike RAM. A power supply provides electricity to the computer. The operating system coordinates hardware and software. Humans interact with computers through input tools and see outputs on displays. Local area networks connect nearby devices, while wireless protocols allow internet access on mobile devices. Caches store frequently used data for quick access. Programming languages differ in how they are compiled and interpreted.