7e Chapter 2

# 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
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
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
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!
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
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
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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