INDIAN INSTITUTE OF TECHNOLOGY ROORKEE
CSN-101 (Introduction to Computer Science and Engineering)
Dr. Sudip Roy
Assistant Professor
Department of Computer Science and Engineering
Lecture 6: Evolution of Computer Hardware, Moore’s Law
Piazza Class Room: https://piazza.com/iitr.ac.in/fall2019/csn101
[Access Code: csn101@2019]
Moodle Submission Site: https://moodle.iitr.ac.in/course/view.php?id=45
[Enrollment Key: csn101@2019]
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Plan for Lecture Classes in CSN-101
(Autumn, 2019-2020)
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The Word – Computer
• The word “computer” was first recorded in 1613
• Originally used to describe a human who performed
calculations or computations
• This definition remained same until the end of the 19th
century, when the industrial revolution gave rise to machines
whose primary purpose was calculating
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Introduction
Today’s Scenario:
personal computer > computer
(2017, $500) (1985, 1 million dollars)
Mainly in terms of:
1. Performance
2. Main memory
3. Disk storage
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Introduction Contd
Reason???
• Advances in the technology used to build
computers
• Innovation in computer design.
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Introduction Contd
Major Factors
• Emergence of the microprocessor (1970s)
• Improvements in IC technology
Introduction Contd
Growth in processor performance since the mid-1980s. This chart plots
