Difference between revisions of "Introduction to ICT the computer"
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became faster, cheaper and smaller.Many transistors were connected together to form one IC. These computers had keyboard and monitor as input-output devices. (You will learn about input and output devices in the next chapter)... | became faster, cheaper and smaller.Many transistors were connected together to form one IC. These computers had keyboard and monitor as input-output devices. (You will learn about input and output devices in the next chapter)... | ||
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Based on the processing power, storage capacity and cost, computers are classified as, | Based on the processing power, storage capacity and cost, computers are classified as, | ||
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'''(c)''' Microcomputers, or personal computers - The small and low cost computers. Microcomputers are more commonly known as personal computers (PC). Personal computers are further classified as (a) Stationary (b) Mobile. | '''(c)''' Microcomputers, or personal computers - The small and low cost computers. Microcomputers are more commonly known as personal computers (PC). Personal computers are further classified as (a) Stationary (b) Mobile. | ||
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(a) Laptop - A laptop computer popularly called laptop, or notebook computer, is a small personal computer designed for carrying where ever we go. | (a) Laptop - A laptop computer popularly called laptop, or notebook computer, is a small personal computer designed for carrying where ever we go. | ||
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Latest revision as of 09:06, 4 June 2014
Introduction to Information and Communication Technologies (ICTs) – The computer |
Introduction to ICTs and computers |
Chapter objectivesIn this chapter, you will learn about
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Introduction to ICTs and computersYou must have heard of radio programmes like Keli kali in your school. You can see that radio, televisions, telephones, mobile phones are being used by everyone in their daily lives. Television and radio are used for giving (broadcasting) information while telephones including mobile phones are used to talk to (communicate with) your friends and family even if they are far away. Now you can carry a phone in your pocket. All these are Information and Communication Technologies (ICTs) tools.
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What does a computer do ?In this chapter you will learn about computers, a new ICT tool. A computer is a device which takes input, processes it and gives output which can be stored and shared. When you enter data into your computer, it is called as input. An input can be data like text or picture or an instruction (what to do with the data). This data is processed (process means to perform a series of operations on a set of data) and you will get the output. Data or information that the computer generates is called the output.
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History of computers
Did you know, the first computer was as big as your classroom! 60 years ago,computers were very big, costly and used lot of electricity. The processors of the first computers were made using something called'vacuum tubes' - which used tubes in which electrons were moving.
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Uses of computersCan you think of all the places where you have seen computers?
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Types of computersBased on the processing power, storage capacity and cost, computers are classified as,
(a)Supercomputers- The most powerful computers.They are used for highly complex problems like launching a rocket in the space or weather prediction. Supercomputers are used by universities and government agencies.
(b) Mainframe Computers - Usually slower, less powerful and cost less than supercomputers. They are used in large organisations, like banks and businesses.
(a) Laptop - A laptop computer popularly called laptop, or notebook computer, is a small personal computer designed for carrying where ever we go.
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Chapter summary
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ExercisesChoose the correct answer
(b) Latest computers use
(c) A personal computer is also a
Say true or false
Activity
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