7e Chapter 2 - MSIS 2103 Chapter 2 1 Chapter 2 Looking at...

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MSIS 2103 Chapter 2 1
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Chapter 2 Looking at Computers: Understanding the Parts 2
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Chapter 2 Looking at Computers: Understanding the Parts
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4 Chapter Topics Functions of a computer Data versus information Bits and bytes Input devices Output devices Processing
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5 Computers Are Data- Processing Devices A computer’s four major functions: Gathers data (users input data) Processes data into information Outputs data or information Stores data and information
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6 Data vs. Information Data: Representation of a fact, figure, or idea Information: Organized, meaningful data
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The Hierarchy of Decision Making The hierarchy of decision making: Data information knowledge decision making
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Example of Numbers in a Hypothetical Small Computer Consider the data item 314 What does this mean? It depends upon how the computer interprets it!
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In Our Hypothetical Example…. 314 could be a representation of the integer three hundred and fourteen 314 could be a representation of the floating point (decimal) number; 14 is the mantissa and 3 is the exponent using base 10 14 times 103 or 14,000 314 could be the coded representation of the character C The computer is told in a computer program whether it is an integer, a floating point number, or a text item
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In Our Hypothetical Example…. The same content can be an integer, a number with a decimal point, or a coded set of character; the computer interprets it depending upon what the computer program says it is This is the way computers work, except that it isn’t three digits based on the decimal
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Data Storage in the Computer Bit Binary digit 0 or 1 Byte Eight bits It takes one byte, eight bits, to represent as text a letter, a numeral, or a special character So, each letter, number, and character = a string
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Data Storage in the Computer For example, the capital letter “A” is represented as 01000001 Lower case “a” is represented as 01100001 The digit 1 is represented as text as 00110001
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13 How Much Is a Byte? Name
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This note was uploaded on 10/17/2011 for the course MSIS 2103 taught by Professor Dr.kletke during the Fall '08 term at Oklahoma State.

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7e Chapter 2 - MSIS 2103 Chapter 2 1 Chapter 2 Looking at...

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