What is the difference between a computer system unit and a central processing unit?  

Central processing unit – the computer’s primary processing device, which interprets and executes program instructions and manages the functions of input, output and storage devices. In personal computers, the CPU is composed of a control unit, an arithmetic logic unit, built memory and supporting circuitry such as a dedicated math processor. The CPU may reside on a single chip on the computer’s motherboard or on a larger card inserted into a special slot on the motherboard. In larger computers, the CPU may reside on several circuit boards.
System unit – in a personal computer, the case that contains the system’s essential hardware components, including the processor disk drives and motherboard.

Answered by Nishu%27s at 3:40 PM on November 02, 2008

Well Koena! A computer system unit is the case with the motherboard and all the ports. The box you unplug and walk around with. The CPU is the Central Processing Unit, this is a chip on the motherboard that does all the processing.

Answered by Kumaar at 8:21 PM on October 30, 2008

well,A computer system unit which includes an acoustic dampening cooling fan shroud panel mounted on a rear surface thereof. The computer system unit is generally rectangular, encloses an electronic component package and includes a front panel and a pair of generally parallel side panels. An intermediate rear panel, generally parallel to the front panel, mounts one or more cooling fans which draw air through the generally rectangular unit. A cooling fan shroud panel which includes an acoustic noise reduction lining is then mounted to the intermediate rear panel. The cooling fan shroud panel includes an aperture for ventilation which is displaced from the mounting position of the cooling fans such that acoustic noise resultant from cooling fan operation is minimized. The aperture within the cooling fan shroud panel extends into at least one surface thereof which is not parallel to either the side panel or the intermediate rear panel wherein ventilation is substantially unobstructed by adjacent vertical surfaces.
A Central Processing Unit (CPU) is a machine that can execute computer programs. This broad definition can easily be applied to many early computers that existed long before the term "CPU" ever came into widespread usage. The term itself and its initialism have been in use in the computer industry at least since the early 1960s (Weik 1961). The form, design and implementation of CPUs have changed dramatically since the earliest examples, but their fundamental operation has remained much the same.

Early CPUs were custom-designed as a part of a larger, sometimes one-of-a-kind, computer. However, this costly method of designing custom CPUs for a particular application has largely given way to the development of mass-produced processors that are suited for one or many purposes. This standardization trend generally began in the era of discrete transistor mainframes and minicomputers and has rapidly accelerated with the popularization of the integrated circuit (IC). The IC has allowed increasingly complex CPUs to be designed and manufactured to tolerances on the order of nanometers. Both the miniaturization and standardization of CPUs have increased the presence of these digital devices in modern life far beyond the limited application of dedicated computing machines. Modern microprocessors appear in everything from automobiles to cell phones to children's toys.

Answered by Debashis at 5:47 PM on October 30, 2008

well, A computer system unit is the case with the motherboard and all the ports. The box you unplug and walk around with. The CPU is the Central Processing Unit, this is a chip on the motherboard that does all the processing.

Answered by Abhi Singh at 4:49 PM on October 30, 2008

central processing unit is the part of computer system.

Answered by Hem@nt .... at 4:49 PM on October 30, 2008