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is the physical parts or components of a computer, such as monitor, keyboard, computer data storage, graphic card, sound card, motherboard, and so on, all of which are tangible objects.
is a musical instrument that produces sound using electronics. Such an instrument sounds by outputting an electrical audio signal that ultimately drives a loudspeaker.
is a multi-purpose electronic computer whose size, capabilities, and price make it feasible for individual use. PCs are intended to be operated directly by an end user, rather than by a computer expert or technician.
is machinery used in engineering. There are many types of such equipment, from hand tools and power tools to tractors and the countless kinds of implements that they tow or operate.
a written or printed work consisting of pages glued or sewn together along one side and bound in covers
an apparatus using or applying mechanical power and having several parts, each with a definite function and together performing a particular task.
are consumables and equipment regularly used in offices by businesses and other organizations, by individuals engaged in written communications, record keeping or bookkeeping, janitorial and cleaning, and for storage of supplies or data.