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Classification of Computers Introduction

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Classification of Computers Introduction Book: IT Planet PetaByte Topic: Classification of Computers Introduction: What is a Computer? A computer is an electronic machine that takes instructions from us and gives the result after processing them. Classification of Computers A computer can be classified in two ways: 1. According to purpose 2. According to size According to Purpose 1. Analog Computer - It takes different input and gives the result after comparison. For example: Thermometer and Speedometer 2. Digital Computer - It works on the principle of binary mathematics. (Binary means 0 and 1) For example: Calculator and Digital Wrist Watch 3. Hybrid Computer – It is a combination of both analog and digital computers. The digital component does logical and numerical operations, while the analog component serves as a solver of mathematical complex equations. For example: ECG machine According to Size 1. Super Computer - It is the fastest, most powerful and very expensive computer. It is used in weather forecasting, nuclear power stations and animated movies. 2. Mainframe Computer - It is large and powerful computer. It can support hundreds of users. simultaneously. It is used for scientific research and mathematical operations. 3. Micro Computer (Personal Computer) - It is smallest in all types of computers. It has microprocessor as its brain. It supports only one user at a time. It is found in offices, homes and schools. Types of Micro Computers 1. Desktop Computer - Its system unit, input and output devices fit on a desk or a table in schools, homes and offices. 2. Laptop Computer - It is also called a notebook. It is small, light in weight and can be easily carried from one place to another. 3. Tablet PC - It is a portable computer with touch screen. Mobile Devices Definition - it is a small, portable and can be carried in a bag or a pocket. It can also be connected to a PC for exchanging information. Examples are: 1. Smartphone - It allows to make phone calls, send and receive text messages and access the Internet. It also allows to capture images and share it with others. 2. E-book Reader (electronic book reader) - It is a small, portable device designed for reading books. It is electronic version of a printed book. 3. Smartwatch - It is worn on the wrist. It has a touch screen. It can show time and can keep track of our physical activities. It can also show notifications for calls, messages, and e-mails. 4. Digital Camera - It allows the user to take pictures and store them as digital images. These pictures can be copied in a computer and displayed on the screen. 5. Game Console - It is designed to play video games by one or more people. It uses: (i) a handheld controller - as its input device (ii) a television screen - as its output device (iii) hard disk or memory card - for storage (iv) Models of Game Console - Sony Play Station 4, Nintendo Wii, Microsoft Xbox 360 Server Definition - It provides data and information to computers attached to each other through a network. It controls access to the hardware (physical parts of a computer), software (programs or set of instructions) and other resources of the network. Youtube Link: https://www.youtube.com/watch?v=uD0acIhi8xE (Classification of computers according to size) https://www.youtube.com/watch?v=TgWlKK62YRg (Classification of computers according to purpose) Classwork: (Pages 11 and 12 to be done in Computer book/loose sheets) A. Tick the correct answer. 1. c. 2. b. 3. c. 4. c. B. Write ‘T’ for True and ‘F’ for False statements. 1. False 2. True 3. False 4. False 5. True C. Fill in the blanks. 1. digital 2. Personal Computers. 3. Smartwatch 4. Sony Play Station 4 D. Match the Following. 1. (c) 2. (e) 3. (d) 4. (a) 5. (b) E. Differentiate between the following. 1. Analog Computer – It works on the principle of analogous data. It takes different inputs and gives the result after comparison. Digital Computer – It works on the principle of binary mathematics. It represents all calculations with 0 and 1. 2. Super Computer – It is the most powerful computer. It is used for weather forecasting, space research etc. Mainframe Computer – It is less powerful than super computer. It is used in business organizations, banks etc. F. Answer the following questions. Ans1. Computers can be classified into two ways: (a) According to purpose (b) According to size Ans2. Server controls access to the hardware, software and other resources on a network. It provides storage area for programs, data and information. Ans3. Micro Computer also known as Personal Computer is small in size and costs less. It is mainly used in homes, offices, shops etc. Its types are: Desktop, Laptop and Tablet. G. Application Based Question. Ans. Smartphone Homework: (To be done in loose sheets) Q1. Fill in the blanks. a. ___________ and _________ are popular models of game console. b. A _________ is a portable computer which has a touch screen. c. A __________ computer is a combination of both analog and digital computers. Q2. Write True or False for the following statements. a. A clinical thermometer is an example of Analog Computer. b. Micro Computer is the biggest and the most powerful computer. c. Smartphone is an internet-enabled phone. Q3. Write the names of the following. a. b. c. .
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