Audio hardware has gone from being an expensive, exotic add-on to being an assumed part of virtually any system configuration. Today's PC audio hardware might take one of the following forms: An audio adapter on a PCI expansion card that you install into a bus slot in the computer.
Computer hardware is the collection of physical parts of a computer system. This includes the computer case, monitor, keyboard, and mouse. It also includes all the parts inside the computer case, such as the hard disk drive, motherboard, video card, and many others. Computer hardware is what you can physically touch.