南昌大学计算机概论ppt

E-Mail Basics
Chapter 1: Computer, Internet, Web, and E-Mail Basics 4
Computer, Internet, Web, and E-Mail Basics Section A: Computer Basics
Chapter 1: Computer, Internet, Web, and E-Mail Basics
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What is a handheld?
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What types of computers can be classified as workstations? • The term “workstation” has two meanings
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What is a tablet computer?
• Portable computing device featuring a touch-sensitive screen • Prices range from $1,200 to over $2,000
Chapter 1: Computer, Internet, Web, and E-Mail Basics
Chapter 1
Computer Concepts 8th Edition Parsons/Oja
What is a computer?
• A computer system includes a computer, peripheral devices, and software • Accepts input, processes data, stores data, and produces output
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What is a computer?
• A computer stores data so that it will be available for processing • Memory is an area of a computer that holds data that is waiting to be processed, stored, or output • Storage is the area where data can be left on a permanent basis
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Is a PlayStation a computer?
• Yes, but typically it has not been considered a computer category • Today’s videogame systems contain microprocessors
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Computer Categories
• Today’s Computer Categories
– Personal computers – Handheld computers – Workstations – Videogame Consoles – Mainframes – Supercomputers – Servers
Chapter 4: File Management, Virus Web, and E-Mail Basics 1: Computer, Internet, Chapter 1: Computer, Internet, Web, and E-Mail Basics Protection, and Backup
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What is a computer?
Chapter 1: Computer, Internet, Web, and E-Mail Basics
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Computer Categories
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Computer Basics
What is a computer?
• Computer output is the result produced by the computer • An output device displays, prints or transmits the results of processing
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What makes a computer a server?
• A server serves the computers on a network by supplying them with data • A client requests data from a server • Any computer can be a server or a client
• Before:
– Categorized into three main categories:
• microcomputers • minicomputers • mainframe computers
• Today:
– Categorized based on its technology, function, size, performance, and cost
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Chapter 1 Preview
After this chapter, you should be able to:
– Define the term computer and identify the components of a personal computer system – Compare the computing capabilities of the computer categories – Describe operating systems – Evaluate the various ways you can connect a computer to the Internet and select an ISP
Chapter 1: Computer, Internet, Web, and E-Mail Basics
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Chapter 1 Preview
After this chapter, you should be able to:
– Describe how Web servers, browsers, URLs, HTML, and HTTP contribute to the Internet resource known as the Web – Describe Internet communications and basic features – Demonstrate that you can use a search engine to locate information on the Web – Explain how an e-mail system works
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What’s so special about a mainframe computer?
• Large and expensive computer • Capable of passing data simultaneously for hundreds of thousands of users • Used by governments and large corporations
– Desktop computers – Notebook computers – Cost starts at $500, but most spend $1000 to $1200
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Chapter 1: Computer, Internet, Web, and E-Mail Basics
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Chapter 1 Outline
• Section A
– Computer Basics
• Section B
– Internet Basics
• Section C
– Web Basics
• Data refers to the symbols that represent facts, objects, and ideas • Processing is the way that a computer manipulates data • A computer processes data in a device called the central processing unit (CPU)
– Input refers to whatever is sent to a computer system
Chapter 1: Computer, Internet, Web, and E-Mail Basics