Date post: | 02-Jun-2015 |
Category: |
Technology |
Upload: | guevarra2000 |
View: | 562 times |
Download: | 3 times |
Data ProcessingLesson 3
3-1 The History of Computers3-2 The Earliest Computing Devices 1. Abacus 2. Napier’s Bones
3. Oughtred’s slide rule 4. Pascal’s Calculator
5. Leibnir’s Calculator 6. Babbage’s analytical Engine
7. Hollerith’s Punched-card Machine
3-1 History of Computers
Historical records will tell us that man has invented three types of devices to assist him in calculating and processing data. They are: Manual mechanical Eletromechanical Electronic
Manual-mechanical : A simple mechanism powered by hand Abacus Slide rule
Electromechanical: It is usually powered by an electric motor and uses switches and relays. Household electrical appliances Calculators Punched cards
Electronic : a device which has its principal components circuit boards, transistors or silicon chips and the like Modern digital computer
3-2 The Earliest Computing Devices
1. Abacus
3-2 The Earliest Computing Devices
2. Napier’s Bones
3-2 The Earliest Computing Devices
3. Oughtred’s Slide Rule
3-2 The Earliest Computing Devices
4. Pascal’s Calculator
3-2 The Earliest Computing Devices
5. Leibniz’s Calculator
3-2 The Earliest Computing Devices
6. Babbage’s Analytical Calculator
3-2 The Earliest Computing Devices
7.Hollerith’s Punched-card Machine