Chap 1 2 Overview Apps Jan Smith Computer
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Chap. 1 & 2 - Overview, Apps Jan Smith Computer Concepts and Applications Spacebar Backspace Esc = = = next slide previous slide quit
Covering: • Review of chapter 1 - Overview
Chapter 1 - Overview A computer is an electronic device that: a. b. c. d. e. operates under the control of memory unit accepts data processes data produces output stores the results for use later
Chapter 1 - Overview Information Processing Cycle Input Processing Output Storage b. c. d. e. accepts data processes data produces output stores the results for use later
Why is a computer powerful? • Speed billions of actions per second • Reliability failures usually human error • Storage keeps huge amounts of data
Categories of Computers • Personal or micro • Mini • Main Frame • Super
Categories of Computers Personal = micro Portable Types: Desktop Tower Workstations Hand-held Notebook Laptop Pen Palmtop Sub-notebook
Categories of Computers Servers (how it’s used more than what it is) Designed to support a computer network More powerful Larger memory Larger storage capacity High speed communications
Categories of Computers Minicomputers Originally for specific tasks, like engineering calculations Main frame Large systems for hundreds users Requires special environment of
Categories of Computers Supercomputers Most powerful category Used for weather forecasting, engineering design and testing, serious decryption Cost several million dollars