Ins and Outs of a Computer and its Process

In today’s modern world we all have more or less learned about the ins and outs of a Computer. We all know there are Input and Output devices of a computer which basically execute any task ordered by the user and show up the result.

INPUT: Any data or instructions used by a computer from the user are the input.

These data or set of instructions or orders are taken by Input devices which transform these into a form that system unit can process. Input devices include:

1. Keyboard (Wireless, PDA, virtual, Traditional etc)

2. Audio Input device

3. Pointing device (Mouse, Stylus, Joystick, Trackball, Touch pad etc. )

4. Scanning device (Optical, Card Readers, Barcode Readers etc.)

5. Image capturing device (Digital camera, Digital video camera, Webcam etc. )

Stylus

Trackball

 

PDA Keyboard

Virtual Keyboard

Barcode Scanner

OUTPUT: The processed data or instructions or the result of any command executed are the output. The devices that show the results are the output devices. Output devices include:

1. Monitors (CRT, LCD, OLED, TFT etc.)

2. Printers(Ink jet, laser, plotters, Dot matrix etc. )

3. Audio Output devices (Portable media players)

OLED Monitor

Plotter

The input and output devices are both part and parcel of a computer.Now, the input devices are hardwares used by the user to enter data whereas the output devices use processed data from computer to perform a task.

Again, Input devices only sends data to process but output devices only receive the processed data.

In case of controlling, input devices are user controlled with the output devices being computer controlled.

The output devices are quiet simpler for users since they only see the results. On the contrary, Input have relatively complex coding for user to interact with computer correctly.    

Getting Data into Computer:  The Computer executes any task or command given from the user by the combination of Input and Output devices. Users provide data or command into computer through Input devices (Keyboard, Mouse, Scanner). This data then moves to the CPU (Central processing Unit). Output devices then show the result or perform the task accordingly after the data has been processed. Besides, required information are also saved to the memory from the CPU directly. This process can clearly be understood from the photo attached below since “A picture is worth thousand words.”