meljun cortes computer information processing chapter 1 with notes
TRANSCRIPT
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CCT101: Chapter 1
Introduction to Computers
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OBJECTIVESOBJECTIVES
Define the term computer Identify the components of a computer
Explain why a computer is a powerful tool
Explain the purpose of a network
Discuss the uses of the Internet and the World WideWeb
Describe the categories of computers and their uses
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WHAT IS A COMPUTER AND WHAT DOES IT
DO?
WHAT IS A COMPUTER AND WHAT DOES IT
DO?
An electronic machine, operating under the control ofinstructions stored in its own memory
That can accept data (input), manipulate data according tospecified rules (process), produce results (output), and store
the results for future use.
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Input Devices
Output Devices
System Unit
Storage Devices
Communications Devices
THE COMPONENTS OF A COMPUTERTHE COMPONENTS OF A COMPUTER
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WHY IS A COMPUTER SO POWERFUL?WHY IS A COMPUTER SO POWERFUL?
Speed
Reliability
Accuracy Storage
Communications
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COMPUTER SOFTWARECOMPUTER SOFTWARE
System software
A series of instructions that tells the hardware of a computer how to
perform tasks
Operating system
Utility program User Interface
Application software
Consists of programs designed to perform specific tasks for users
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Application Software
Packaged software
Custom software
Shareware
Freeware Public-domain software
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NETWORKS AND THE INTERNETNETWORKS AND THE INTERNET
Network
Sharing resources
Local area network - LAN
Wide area network
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NETWORKS AND THE INTERNETNETWORKS AND THE INTERNET
Internet
E-mail
Information
Shopping
Meeting people Entertainment
Web page
Web site
Web browser
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Personal computers
Minicomputers
Mainframe computers
Supercomputers
CATEGORIES OF COMPUTERSCATEGORIES OF COMPUTERS
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Can perform all of its input, processing, output, and storage
activities by itself
Desktop Computers
Tower model
Workstation
Stand-alone
Server
Network computers
PERSONAL COMPUTERSPERSONAL COMPUTERS
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Portable Computers
Laptop computers
Handheld computers
Pen computers
Office on your arm video
PERSONAL COMPUTERSPERSONAL COMPUTERS
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Support up to 4,000 users
Often connected via a terminal
MINICOMPUTERSMINICOMPUTERS
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Large, expensive, very powerful computer that can handle
hundreds or thousands of connected users
MAINFRAME COMPUTERSMAINFRAME COMPUTERS
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Fastest, most powerful computer
Able to process more than 64 billion instructions per second
SUPERCOMPUTERSSUPERCOMPUTERS
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Home User
Home software
Software for children
Home use of the web Computer family video
EXAMPLES OF COMPUTER USAGEEXAMPLES OF COMPUTER USAGE
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Small Business User
Desktop users
EXAMPLES OF COMPUTER USAGEEXAMPLES OF COMPUTER USAGE
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Small Business User
Desktop users
Productivity software
Specialized software Web usage
Small business web sites
EXAMPLES OF COMPUTER USAGEEXAMPLES OF COMPUTER USAGE
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Mobile User
Many types of mobile users
Presentations
Docking station
EXAMPLES OF COMPUTER USAGEEXAMPLES OF COMPUTER USAGE
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Large Business User
Order entry
PDAs for organization
Large business web site Kiosk
EXAMPLES OF COMPUTER USAGEEXAMPLES OF COMPUTER USAGE
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Power User
Engineers, architects, desktop publishers, graphic artists
Specialized software
EXAMPLES OF COMPUTER USAGEEXAMPLES OF COMPUTER USAGE