The computer is an amazingly useful general-purpose technology, to the point that now cameras, phones, thermostats, and more are all now little computers. This section will introduce major parts and themes of how computer hardware works. "Hardware" refers the physical parts of the computer, and "software" refers to the code that runs on the computer.
When choosing hardware, make sure that any new or replacement components are compatible with your existing computer equipment. Consider the overall costs, including if it might be cheaper to install a new system rather than upgrade the existing components.