Alfred is a long-time teacher and computer enthusiast that works with and troubleshoots a wide variety of computer devices.

You are watching: What are the three functions that a computer program performs?


The four functions that a computer actually describe the core factors why it to be built. Castle include:

Data inputData processing.Information output.Data and also information storage.

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To highlight the four features of a computer, we can take a look in ~ the an easy steps us all go through to produce a LETTER on the computer.

It starts once the user composes, inputs and also edits set of letters, numbers and symbols using a keyboard. The life data is then processed and also viewed real-time via display screen hardware.


Finally, the user may choose to publish the letter top top paper, or much better still send it via digital mail to designated recipients.

The same data and also information deserve to be retained digitally in decaying drives and also other media because that future reference.

1. Data Input

Every computer system is designed v data input together a first function, an activity which is achieved via entry devices.

Data entry is excellent manually, automatically or both. Hand-operated input is excellent via add-on peripherals like the keyboard, mouse and stylus. Input can likewise be accomplished via vocal dictation applications and also body gestures peripherals like Kinect and biometric devices. Elsewhere, data input is likewise done using secondary storage media and networking interfaces.


Application software used for this objective will also dictate what data is entered. Word processing software is designed come input simple alphanumerical data, while a photo editing application is offered to input and manipulate images.

This data may be gone into into a database, spreadsheet or other forms of a computerized occupational area.

Automated applications and also robotics can additionally be supplied to intelligently feeding data into the computer system on terminal or remotely. As an example, tallying the electoral procedure can be completed remotely and also automatically.


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2. Data Processing

Data processing is the core duty of a computer. Processing requires manipulation of life data into before converting the into coherent information. Usually, data is in life form, and also will therefore undergo processing before dissemination because that user consumption.

The 'brain' of the computer system where data is processed is described as the microprocessor. The is additionally commonly recognized as the main processing unit (CPU) or sped up processing unit (APU).


The processing chips in modern personal computer devices continue to evolve and outperform its predecessors. One specific evolution is the closing of microprocessor and also graphics processing unit (GPU) into what is now known as accelerated processing unit. The merger permits for the integration of powerful graphics processing abilities within the classic arithmetic and logical computations that the processor.


Besides the microprocessor, the dynamic random access memory (DRAM) and static random accessibility memory (SRAM) are integral parts of data processing. Data gone into via input tools is save on computer temporarily in DRAM, then moved to SRAM from wherein the microprocessor manipulates it.


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An AMD microprocessor, inserted onto a laptop motherboard socket

An AMD microprocessor in a laptop computer


3. Information Output

When raw data has actually been manipulated by the microprocessor, the result is expected to it is in disseminated for useful purposes. The calculation is therefore referred to as information and is helpful to the computer system user.

Processed data or information can be,

viewed as alphanumeric, pictures and video via a display screen hardwarelistened to as audio records by use of a speakerprinted as hard copy calculation onto paperprinted as 3D models
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4. Data and also Information Storage

The fourth and also equally really important duty of a computer is data and information storage. After sleepless nights of video and computer animation creation and editing, the user desires to have actually the perfect product stored for future circulation and added editing.


A computer can store information internally and externally. The tough disk drive (HDD) and/or solid-state disk journey (SSD) are interior storage devices and also serve come protect and house every data and information on a computer. In bigger systems, the RAID system is used. Multiple disk drives run simultaneously to ensure data and also information integrity.

External warehouse is achieved through accessories that attach externally to the computer. They encompass external drives and also optical disks.

Better tho data and information have the right to be stored digital in cloud options for a dues or for a fee if huge space is required.

Storage verity is a vital phase that can actually recognize the worth of a computer system system. In any kind of case, what use is a computer without data and also information?


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This short article is accurate and true to the ideal of the author’s knowledge. Contents is for informational or entertainment functions only and does not substitute for personal counsel or expert advice in business, financial, legal, or technical matters.


© 2013 Alfred Amuno

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