Computersare used for a wide variety of purposes.
Partsof a computer
Dataprocessing iscommercial and financial work. This includes such things as billing, shippingand receiving, inventory control, and similar business related functions, aswell as the “electronic office”.
Scientificprocessing is usinga computer to support science. This can be as simple as gathering and analyzingraw data and as complex as modelling natural phenomenon (weather and climatemodels, thermodynamics, nuclear engineering, etc.).
Multimedia includes content creation(composing music, performing music, recording music, editing film and video,special effects, animation, illustration, laying out print materials, etc.) andmultimedia playback (games, DVDs, instructional materials, etc.).
Partsof a computer
Theclassic crude oversimplication of a computer is that it contains threeelements: processor unit, memory, and I/O (input/output). The borders betweenthose three terms are highly ambigious, non-contiguous, and erraticallyshifting.
Aslightly less crude oversimplification divides a computer into five elements:arithmetic and logic subsystem, control subsystem, main storage, inputsubsystem, and output subsystem.