Learn Computer Basics

Computer

What is it?

Computer is an electronic device that is designed to work with Information. derived from the Latin term ‘computare’, this means to calculate or programmable machine.

Who invented it?

Charles Babbage is called the "Grand Father" of the computer.

What it does?

Computer is an advanced electronic device that takes raw data as input from the user and processes these data under the control of set of instructions (called program) and gives the result (output) and saves output for the future use. It can process both numerical and non-numerical (arithmetic and logical) calculations.

How the computer works?

1.  Input (Data):

     Input is the raw information entered into a computer from the input devices. It is the collection of letters, numbers, images etc.

2.  Process:

     Process is the operation of data as per given instruction. It is totally internal process of the computer system.

3.  Output:

     Output is the processed data given by computer after data processing. Output is also called as Result. We can save these results in the storage devices for the future use.

Internet

•What is it?

•The internet is the biggest world-wide communication network of computers. It has millions of smaller domestic, academic, business, and government networks, which together carry many different kinds of information. The term is sometimes abbreviated as "the net".

•Who invented it?

•The internet was developed in the United States by the "United States Department of Defense Advanced Research Projects Agency" (DARPA). It was first connected in October, 1969.

•When?

•It was first connected in October, 1969

•What does the Internet do?

•The Internet has one very simple job: to move computerized information (known as data) from one place to another. That's it! The machines that make up the Internet treat all the information they handle in exactly the same way. In this respect, the Internet works a bit like the postal service. Letters are simply passed from one place to another, no matter who they are from or what messages they contain. The job of the mail service is to move letters from place to place, not to worry about why people are writing letters in the first place; the same applies to the Internet.

  Just like the mail service, the Internet's simplicity means it can handle many different kinds of information helping people to do many different jobs. It's not specialized to handle emails, Web pages, chat messages, or anything else: all information is handled equally and passed on in exactly the same way.

Services on the Internet

•The internet is used for many things

1.  Electronic Mail

2.  Online chat

3.  File transfer

4.  Interlinked web pages and other socuments of the world wide web.

5.  The most used service on the internet is the World Wide Web (which is also called the "Web"). The Web contains websites, including blogs and wikis like Wikipedia. Webpages on the internet can be seen and read by anyone (unless the page needs a password, or it is blocked).

6.  The second biggest use of the internet is to send and receive e-mail.

Advantages and Disadvantages of Internet

•There are many advantages of internet.

1.  We can make donations online.

2.  We can send and receive information across large matrix of computer systems. Through email service, we can send messages for both business and personal purposes.

3.  Internet has opened doors for virtual online offices.

4.  During the festive season, we don’t need to visit crowed stores to buy our stuff. We can make online purchases at a bargain price.

5.  We can send birthday greeting cards through the internet.

6.  Before making any purchases, we can check online for user reviews of the products that we intend to buy.

7.  We can use social media applications on our personal computer and mobile devices. In this way, we can reconnect to our old school friends.

8.  We can gather information for new job openings. We can also apply online for jobs.

9.  We can earn online by doing freelancing jobs, selling online, completing surveys, affiliate marketing, etc.

10.  We can also sell old items that are of no use for us.

11.  During idle time, we can listen to music or watch a video.

The disadvantages of internet are:

1.  We often tend to purchase those extra items that we rarely need. Such  purchases are a wastage of money. 

2.  The internet is not free. Sometimes, it hurts while paying bills.

3.  There are hundreds of vendors selling products of various brands. We

get confused with too many choices.

4.  The transaction cost levied by the payment gateway providers decreases the

margin of the online sellers.

5.  Too many contradictory review leads us nowhere.

6.  The physical distance among loved ones is increasing.

7.  Somewhere the emotional connect between people are missing.

8.  We feel helpless when the internet connection is down.

9.  We always remain engaged with many online activities such as checking emails,

socializing, chatting, online shopping, business-deals, etc. We don’t get time to

rest.

10.  Our life is moving at the pace of internet. We seldom spare few moments of

peace for us.