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What is Computer?

Computer is an electronic device which is developed by "Charles babbage" near by 19th century.
It take inputs data from the input devices, stores and processed it and produces output.

Computer work on below cycle

Input -> Process -> Output

Components of computer.

Two types of components available in computer are hardware and software


  • Input devices.
  • Output devices.
  • Storage devices.


  • Application Software
  • System Software

Characterstics of computer.

  • Speed
  • Accuracy
  • Storage
  • Quick decesion
  • Repeated capability

Explanation of characteristics of computer.


Computer can complete any kinds of calculation in a few seconds because computer is a super-fast machine.


Computer is very accurate about its result. Each calculation performed by computer is 100% correct.


Computers are automatic machines because once started on a job, they carry out the job until it is finished.


Computers is versatile device because it can perform a variety of task.


Computers have high storage capacity, due to which they can store large amount of data.


Computer is a reliable machine that can be trusted for a long time. This is the reason that today every organizations depend on the computer for their work.


The biggest feature of computer is that it provides us high security


Computer is a machine, that can do any work 24*7 without being tired, non-stop & without fault.


Multitasking is one of the great feature of computer because they can do many tasks at same time.


In computer, it is possible that we can easily share our data from one computer to another.

Files And Folders in computer

What is Folder?

Folder is a container of files, and subfolders. We can create folder by simply right click -> select new foler on any where in our computer sytem. Folder is also called directory.

What is File?

File is a collection of informations, we can create file inside folder or outside folder, just simply right click -> select new office word document or any other file.

Types of files and there extensions

  • Notepad File extension(.txt)
  • Word File extension (.doc/.docx)
  • PDF File extension (.pdf)
  • Excel File extension (.xls/.xlsx)
  • Power Point File (.ppt/.pptx)