DIY computers are personal computers that individuals build and customize themselves, often using off-the-shelf components. This process allows users to select specific parts, such as the CPU, motherboard, RAM, and storage, tailoring the machine to their needs, whether for gaming, graphic design, or general use. Building a DIY computer can be a rewarding experience, as it teaches valuable skills in hardware assembly and troubleshooting. Many enthusiasts share their projects and tips online, fostering a community where beginners can learn from experienced builders. Resources like YouTube tutorials and forums provide guidance and support throughout the process.