Classification of computers by type

Classification of Computers by Type

1. Friday, November 11, 2016 Classification of Computers by Type

2. Learning Outcomes At t he end of the lesson, I should be able to: Identify computers classified by type State the characteristics of computers by types State examples of computers by types

3. Computers are classified into three types with respect to Function or Internal hardware structure or Logic used. They are: Digital Computer Analog Computer Hybrid Computer

4. Digital Computers Digital Computers works on discrete data. Characteristics: Discrete data refers to discrete values such as 0, 1. Digital computers works on 0,1(Binary Numbers) These computers based on the presence or absence of an electrical charge or binary 0 & 1. The native language of this class is therefore called binary language (Machine Language) These Systems are more accurate and precise than others Examples: - calculators, digital watches etc… Examples: The calculator Cell phones PDAs – Personal Digital Assistant IPads Graphics tablets etc.

5. Analog Computer Analog Computers works on continues data. Characteristics: Continues data refers to those values that cannot be discrete. Temperature, air pressure, speed, current, weight etc Analog computer calculates the result by measuring the continuous change in these quantities Analog computers do not require any storage capability because they measure and compare quantities in a single operation These Systems are more speedy than digital Examples: Speed meter, air pressure measurement devices, rain gauge etc. Speedometer of a car measure speed in terms of km/h or m/h, the change in temperature is measured by a thermometer in degrees. Examples: Quartz clock Speedometer Fuel pump Microphone Speakers etc.

6. Hybrid Computer Combine the best feature of both digital and analog systems Characteristics: Works on both analog and digital data Speedy like analog Accuracy like digital They are used mainly in specialized applications where both analog and digital information needs processing Weather forecasting, Air Defense, Radar Controlling systems, digital petrol pumps etc. In petrol pumps, fuel flow converts into quantity and then quantity is converted into values. Examples : Electronic cardiograph (ECG) Automatic Teller Machine (ATM)

7. Assignment Find out what computer is fastest, between Supercomputer and mainframe computer.

8. Word list Discrete Digital Analogue Hybrid Logic Algorithm