CLASSIFICATION OF COMPUTER

CLASSIFICATION OF COMPUTER FOR GRADE 4 PUPILS

1. Topic: CLASSIFICATION OF COMPUTER By Israel i . enuekwe

2. We are learning to: a. State the types of computer b. Classify computers. ( i ) According to purpose (ii) According to speed/size (iii) According to data processed

3. TYPES OF COMPUTER (according to data processed) There are three types of computers. This classification is based on how they work. They are:- Analog computer Digital computer Hybrid computer NOTE: To change images on this slide, select a picture and delete it. Then click the Insert Picture icon in the placeholder to insert your own image.

4. Types of computer Analog computer : This is not a very common computer. It works by measuring data. Examples are thermometers, speedometer and electric meter. They are used by scientist and engineers. They are used for measuring temperature, speed and current. NOTE: To change images on this slide, select a picture and delete it. Then click the Insert Picture icon in the placeholder to insert your own image.

5. Types of computer Digital computers:- They accepts data in binary form (0s and 1s). They work by counting data. Most computers are digital computers. Other devices that work like digital computers are calculators, most resent car speedometers, electronic watch and stop watch. NOTE: To change images on this slide, select a picture and delete it. Then click the Insert Picture icon in the placeholder to insert your own image.

6. Types of computer Hybrid Computers:- Is a digital computer that accepts analog signals and converts and processes them into digital form. They work like both analog and digital computers. They work by measuring and also by counting data. It is the type used for space exploration, like going to the moon. NOTE: To change images on this slide, select a picture and delete it. Then click the Insert Picture icon in the placeholder to insert your own image.

7. CLASSIFICATON OF COMPUTER ACCORDING TO SIZE AND SPEED . There are four different size of computer. They are:- Super Computer :- This is the biggest, most powerful and the fastest computer. It is as big as room. A supercomputer is used in weather forecasting, nuclear power stations, military simulation, research laboratories and animation movies.

8. CLASSIFICATON OF COMPUTER ACCORDING TO SIZE AND SPEED . Mainframe Computer: This is a large computer with a huge storage capacity. It is used in large business or in government organization to perform complex tasks. Bulk data processing such as census, industry and consumer statistics,  enterprise resource planning , and transaction processing. It is as big as a closet. They are mostly used for scientific research purposes.

9. CLASSIFICATON OF COMPUTER ACCORDING TO SIZE AND SPEED . Mini Computer:- This is smaller than mainframe computer but bigger than microcomputer. It can be used by many people at the same time. It is not as expensive as mainframe. It is not as fast as mainframe. It is used in universities, polytechnics, companies etc. It is about the size of a refrigerator. It is used for scientific research, and also in places like banks and large organisations.

10. CLASSIFICATON OF COMPUTER ACCORDING TO SIZE AND SPEED . Microcomputer :- It is the smallest type of computer. It is not as fast and costly as mini computers. It can be used at homes, offices, school etc. It can serve only one person at a time and so can be called personal computer. Peripherals such as keyboard, mouse, monitor and system unit are parts of the microcomputer system. Types of microcomputer Desktop computer Laptop computer Palmtop/hand held computer

11. CLASSIFICATION OF COMPUTER BY PURPOSE: Computer can be categorized by its purpose. There are two main purposes of a computer. These purpose are “ special and “ general”.

12. CLASSIFICATION OF COMPUTER BY PURPOSE: General purpose computer :- This are designed to solve a large variety of problems. Example is microcomputer which can be used for word processing, spreadsheet, database, games, communication and other jobs.

13. CLASSIFICATION OF COMPUTER BY PURPOSE: Special Purpose Computer :- These computers are made for one particular purpose. Example is a word processor computer which can only be used for typesetting of documents. The computer that landed man on the moon was specially built for that purpose. Robots are special computer built to do what man could have been doing by himself.

14. Revision questions A road traffic control computer is an example of ____computer (a) general purpose (b) microcomputer (c) special purpose. ______Computers are designed for a particular work . (a) General purpose (b) Analog (c) Special purpose Which among these is the fastest in processing data?. (A) Manual (b) Electronic (c) Computer List 3 types of computer. Mention two computers each under the following classification of computer. According to purpose According to data processed According to size.