信息技术及应用第二讲

• Computer System: A computer and all the hardware interconnected with it. – Hardware – Programs – Information – People – Procedures
Senn, Information Technology, 3rd Edition
Senn, Information Technology, 3rd Edition
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Hardware: Computing, Storing and Communication
Hardware (Continued)
Senn, Information Technology, 3rd Edition
Hardware: Computing, Storing and Communication
Hardware
• Hardware (computer hardware or devices): The computer and its associated equipment. – Input devices – Processors – Output devices – Secondary storage devices
• Differentiate between an operating system and an application program.
Senn, Information Technology, 3rd Edition
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Objectives (Continued)
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Hardware: Computing, Storing and Communication
Definition (Continued)
Senn, Information Technology, 3rd Edition
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Senn, Information Technology, 3rd Edition
• Explain the difference between single- and multi-user systems.
• List the 13 information-processing activities associated with the five information-handling functions of IT.
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Hardware: Computing, Storing and Communication
Hardware (Continued)
Senn, Information Technology, 3rd Edition
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Hardware: Computing, Storing and Communication
Input Devices
• Input: The data or information entered into a computer or the process of entering data or information into the computer for processing, storage and retrieval, or transmission. – Keyboards – Point-of-sale terminals – Mouse – Image scanners – Bar code scanners and wands – Microphones – Prerecorded sources
James A. Senn’s Information Technology, 3rd Edition
Chapter 2
Essentials of Computing
Senn, Information Technology, 3rd Edition
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• Identify 10 types of software packages.
• Explain the four components of information.
• Distinguish between the users of information technology and IT professionals.
• Describe the four types of procedures in computer systems.
Senn, Information Technology, 3rd Edition
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Objectives (Continued)
Objectives
• Identify the five components of a computer system.
• Explain the four categories of hardware and their functions.
• Discuss the relationship between hardware and software.
Senn, Information TecHale Waihona Puke Baidunology, 3rd Edition
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Hardware: Computing, Storing and Communication
Definition
• Computer: An electronic system that can be instructed to accept, process, store, and present date and information.