Information Technology of Management

IT for Managers Module-1

Modern Computer Systems Faculty: R. Sivasankari

Topics

• • • • • • Evolution of computers Input, Output & Storage technologies Hardware & Software Computer assisted control & Automation Biometric/RFID based Access Control Storage of Data Resources

IT For Managers, Module - 1

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Evolution of Computers

• The need for counting, computing or processing data has been with man from the beginning. • ABACUS

• The most significant early computing tool

• Analog Calculators

IT For Managers, Module - 1

• Napier’s rule (based on logarithms) • Pascal’s machine (able to count and add) • Leibniz’s device (add, subtract, multiple, divide and square root)

• Digital Computers

• Charles Babbage

• Difference engine (1822, automatic mechanical calculator) • Analytic machine (1833, general-purpose, programmable, automatic mechanical digital computer)

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Evolution of Computers (cont’d)

• Invention of punched cards • The calculating machines became fully automatic • In 1896 Herman Hollerith formed the Tabulating Machine Company which manufactured punch card machines. • After his retirement in 1913, Thomas J. Watson, Sr. became president of the company, which became International Business Machines Corporation in 1924. • This company was later to play a significant role in the evolution of computer system

IT For Managers, Module - 1

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Modern Digital Systems

• MARK – 1

• the first information processing machine

• ENIAC (during World War II)

IT For Managers, Module - 1

• Electronic Numerical Integrator and Calculator • The first all-purpose, digital electronic computer

• EDVAC

• Electronic Discrete Variable Automatic Computer • A stored - program computer

• UNIVAC – 1

• Universal Automatic Computer • The first commercial computer produced for the Census Bureau, but was used extensively by the scientific community

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Generations of Computers

• First generation

• Vacuum tubes • Magnetic drum, punched...