what is computer Define Hardware and software what is memory Define operating system.

                            computer 

Today we are going to study about computer I try to cover all topic in this post so let's see.

First we have to know what is computer.

what is computer.?

A computer is an electronic device that takes the input and give as a raw data, processes it into information, and gives an output.

components of computer

A computer system is made with two main things.

1)Hardware.

2)software.

What is hard ware..?

The physical components of computer systems which we can touch and feel are called Haedware..

The collection of physical part  computer is known Hardware..

what is software..?

Software is a set of programs which govern smooth operations of the computer system.A software consists of instruction that tells the hardware. How to perform a task..

software is all the thoughts and mental processes that tell our body parts what to do. software is all the letters, words sentence in the text book...

These are the order given to the computer in a language it can understand and able to do.

A collection of instructions that tells to  computer what to do.? 

Both hardware and software are essential of a computer system. in absence of hardware,  software, is unusable and without software hardware is unusable.

Hardware and software together forms a usable computing system.

Types of Hardware.

Computer Hardware is broadly classified into follwing.

1)input Device.

2)processing Devices.

3)storages Device.

4)output Devices.

5)communication Devices 

Types of software 

Software are broadly classified into2 categories.

System software 

System software controls all the hardware of this machine it allows different parts of computer to work together to perform a specific task.

Types of software

Operating system 

Utility software 

Computer cannot work by own. They  

Required instructions to work and manage the system This work is done by operating systems.

Hard disk is  a magnetic disk on which wan store computer data.

Operating system 

It is software 

It works as an interface between both the users and hardware of computer systems.

When we switch on the computer system the operating system is loaded from hard disk secondary memory to primary memory.

What is memory ?

Memory holds all raws and process data ,set of instruction and information inside the CPU.

Primary memory 

primary memory stores the data which is currently in used by the computer.

Ram (random access memory)

It is volited memory 

it is a temporary storage 

Rom (read only memory)

It is non volatile memory where all logical data is present that can't be changed

Secondary memory 

It stores data programs instruction and information pramantly.

Networking 

Computer networks reblees to the communication between a group of two or more computers linked  together according to scale or size,

 computer network is categorised in three different ways..

LAN Local areal network =graphical area spreed over 1km to 10km or within a same building. 

MAN =graphical area spread over a tow and city 

WAN=( wide area network ) graphical area spread over countries.

SECURITY THRATS=worm It is a self contained program and  does  not need to be a part of another program to propagate It self

spam spam is an unsolictted message sent over the Internet in the from of e-mail to a large number of a user's for the purpose of spreading malware, advertising phishing etc.

 SPYWARE 

It is a type of malicious software installed on computer and collects information about user's without their knowledge and may send such information to another entity.

 Malware

 A software which is specifically designed to disrupt or change a computer system. It is a superfast of computer virus ,worms,spyware ,trojan horses and other malicious or unwanted software.

 Virus 

A virus is defined as a program or a pice of code that gets laded into the computer without user's knowledge.

INTERNET

It is the worldwide, publically accessible system of Interconnected computer networks that transmit data in a particular coded form so that only these can read and process. 

SUPER COMPUTER 

A super  computer is the most powerful computer in terms of performance and storage capacity. 

They are highly expersive.....

SUPER COMPUTER DEVELOPED INDIA =Aditya =2013    Pramshivay= 2019    Pratyush=2017   Pram ishan =2016   and many dva