Applied Science / Information Technology Essay


Component of the System Unit

The component of the system unit can be regarded as the language and science of a computer system. By language and science, it means that the component of the system unit (and the system unit itself as a pack) functions as a medium of organizing and permitting instruction for performance on a computer system.

The component of the system unit is quite numerous as it is the only part of the digital computer system which houses greater functions. At this, it is a very vital system without which the computer can neither be operated nor can it operate. The system unit is a rectangular packet that is also regarded as a tower or the chassis and it is a central portion of a desktop computer.

The system unit contains the component of the computer which is used to process data. It comes with a difference in sizes and shapes depending on the size and type of the digital computer purchased. However, it remains an important electronic particle of the computer which permits the reception of data and the giving out of information through the computer.

Components of the System Unit and their functions

The Motherboard: the Motherboard is often also regarded as the system board because it is the main circuit board of the system unit. By circuit board, it means that electronic components that are attached to the board are through the circuit board. Moreover, numerous chips are found on the motherboard, chips which are semiconducting equipment through which incorporated circuits are branded.

With the integrated circuits which are microscopic paths for the transmission of electrical currents, components such as resistors, capacitors and transistors can be found in them. Further, the Motherboard has openings for adapter cards, the processor and a slot for the permission of external memory.

The Central Processing Unit

The CPU is also regarded as the Processor which functions as a tool that interprets and executes basic instructions as regulated on the computer system. This processor influences all computing powers and also oversees most of the computer system’s operations.

The processor or CPU contains a control unit and an Arithmetic Logic Unit (ALU) which directs and coordinates the computer operations and is a component of the processor which performs all arithmetic comparison on the computer system respectively.

The processor also contains the computer system and clock while it directly coordinates the computer.

The Machine Cycle

This is closely related to the processor because the processor reiterates four basic operations that make up the machine cycle. These operations include fetching, decoding, executing and storing.

Fetching is the first process that includes collecting a program instruction or data article of the computer system from memory.

Decoding is the means through which the retrieved data is interpreted into instructions and commands which the computer system discerns.

Executing is however the process of accomplishing the commands which the computer system had understood.

And lastly, storing is the process of writing and preserving such data into memory.

The registers: the registers are temporary storage sites that are used to retain data and instruction for a particular period. The microprocessor comprises different patterns of registers, and they function as storage units for the location where information has been fetched; a storage unit for the location where information was decoded; a storage unit for where the Arithmetic Logic Unit processes such information and the register also function as storage units for results for a calculation. These are temporarily saved until the data is saved in a secured location according to the interest of the user.

The system clock which also functions as coordinated by the processor is a small chip that synchronizes and controls the timing of a computer system’s operation. It generates regular electronic ticks which set the operating space of the computer system.

Further, each electronic pulse/tick is regarded as a clock cycle and it ensures that time is fixed to each operation of the computer system.


The RAM which means Read Access Memory is the sole proprietor and the main storage memory of the computer system. It functions as a tentative medium for saving data. The RAM permits the access of the CPU following the coordination of the accessibility of data randomly by the CPU.

The RAM improves the rate of computer operations by its ability to allow random access to data. By this, the larger the volume and capacity of the RAM, the faster the access of the CPU into its data. The RAM is an important component of the system unit because, without it, data cannot be stored on the computer system.

Further, a computer system can use more than one RAM, this is solely according to the preference of the user. However, the number of RAM a user can use on the computer system is limited as the number of slots on the Motherboard determines that.

Hard Disk or Hard Drive

This is a major storage unit of the computer system. The hard disk or hard drive unlike the RAM stores information, files and documents permanently. The main function of the hard drive is to store files as commanded by the user through the CPU operations and it also permits the recovery of these files. The operating system and the software or application which is used on the computer are also stored in the hard drive.

The capacity of the hard drive falls between 20 gigabytes to 2 terabytes. Today, the computer systems produced contains 2 hard drives: primary and secondary hard drives. The primary hard drive is used to store and save files while the secondary hard drive is used for a backup so that the primary hard drive will not be whelmed with files as it could slow down the operation and activities of the computer system.

The computer Fan

The computer fan is another component of the system unit. A manufacturer can produce 1 or more fans into the system unit. During computer operations, the CPU produces a lot of heat which could damage the computer. However, the fan functions as a regulator which reduces the heat of the CPU into a required and friendly temperature.


The component of the system unit is both the language and the science of the digital computer system. As expressed above, without the system unit and its component, the digital computer is merely a monitor which receives no data, processes no data or give out information.

HenceComponent of the System Unit, the system unit is the brain of the computer which houses important elements in which the computer system and its operations are effective and successful.

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