slide01 - ICS 103 Computer Programming in C Handout-1 Topic Overview of Computers and Software Objective To know about some historical developments in

slide01 - ICS 103 Computer Programming in C Handout-1 Topic...

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ICS 103: Computer Programming in C Handout-1 Topic: Overview of Computers and Software Objective: To know about some historical developments in the field of Computers. To learn about some basic things of computers. To know about Software Development Method (i.e Steps in writing good quality program) To know how to apply Software Development Method (Steps) for writing good programs. What is Computer? : Computer is an electronic machine which is used for data processing. The output which comes after processing data through computer is known as Information. History of Computers : We categorized the developments in the field of computers in the form of different computer generations as follows : Zero th generation (1642 to 1945) : Mechanical calculators was developed as computing device. First Generation (1945 to 1955) : In 1946 first electronic computer ENAIC (Electronic Numerical Integrator and Calculator ) was developed by Mr. J.Presper Eckert and Mr. John Manuchly at University of Pennsylvania. It uses 18,000 vacuum tubes and its cost was $500,000. Its weight was 30 tons and occupied a 30 by 50 foot space. It produced large amount of heat. Its speed was very slow. Second generation (1955 to 1965) : In this second generation vacuum tubes were replaced by transistors. Speed / performance of this generation computers was improved in comparison to first generation computers.
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  • Spring '10
  • zaman
  • Computer program, Software Development Method

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