Information System

orangesvetElectronics - Devices

Nov 8, 2013 (4 years ago)

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NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Competencies


Five parts of Information System


System Software and Application Software


Three Kinds of System Software


Basic and Specialized Application Software


Four Types of Computers


Four Types of Microcomputers


Different types of Computer Hardware


Data and Files


Computer Connectivity, Wireless Revolution and Internet

Chapter 1 Information Technology,
The Internet and You

NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Key Terms


Application Software


Basic Application


Communication Device


Compact Disc(CD)


Computer Competency


Connectivity


Data


Database file


Desktop Computer


Device Driver


Digital Versatile Disc(DVD)


Digital Video Disc(DVD)


Document File





End User


Floppy Disk


Hardware


High Definition


Information


Information System


Information Technology(IT)


Input Device


Internet


Keyboard


Mainframe Computer


Memory


Microcomputer




NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Key Terms


Microprocessor


Midrange Computer


Minicomputer


Modem


Monitor


Mouse


Network


Notebook Computer


Operating System


Optical Disc


Output Device


Palm Computer


People





Personal Digital Assistant(PDA)


Presentation File


Primary Storage


Printer


Procedures


Program


Random Access Memory(RAM)


Secondary Storage


Software


Specialized Application


Supercomputer


System Software


System Unit


Tablet PC


Wireless Revolution


Worksheet File





NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Information System


Five Parts:


People:
End Users


Procedures:


Rules or Guidelines documented in manuals written by computer


specialists


Software:
Program consists of step
-
by
-
step instructions


Hardware:
Equipments controlled by software


Data:
unprocessed or raw facts

An additional part:


Connectivity:
allow computers to connect each other and share information


Information Technology(IT):





NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


People


The most import part of an information system


This book help you to become competent with computers


Making IT work for you (Examples in Figure 1
-
3)


Tips (Examples in Figure 1
-
4)


Careers in IT


Computing essentials web site

NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Software(Program)


Step
-
by
-
step instructions


System software and Application Software


System Software: the one used by the computer


Application Software: The one used by the end users


System software


“Background software” that helps the computer to manage its own internal
resources


Three kinds of System Software:


Operating Systems
: The most important system software which can
coordinate computer resources, provide interface between users and
computers. Such as Windows XP, Vista, Mac OS, Linux etc.

NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Utilities:


Perform special tasks related to manage computer resources, such as


Disk defragmenter, Virus protection software.


Device Drivers:


Specialized programs to allow the device to communicate with the
computer systems.


Application Software


Basic applications (Figure 1
-
7)


Specialized applications


NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Hardware


Four types of Computers


Supercomputer


Mainframe computer


Minicomputer (Midrange computer)


Microcomputer


Four types of microcomputers


Desktop computer


Notebook computer (laptop computer)


Tablet PC


Handled computer(Palm computer):


Personal digital assistant(PDA)

NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Hardware of Microcomputers


System Unit



microprocessor (CPU)


memory (Primary storage, Random Access Memory: RAM)


Input/output devices


Input devices:
Keyboard, mouse, lighting pen, scanner


output devices
: monitor, printer, speaker


Secondary storages


Floppy


Hard disk


Optical disks:
CD, VCD, DVD, High
-
definition disc

NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Communication


communication devices:



modem



adapter card



switcher



hub



router

Communication media:


Telephone line


Twisted pair


Coaxial cable


Radio, Microwave, infrared light



NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Data


Raw, unprocessed facts, including text, numbers, images and sounds


Four common types of files:


Document file: created by word processors


Worksheet file: created by spreadsheets


Presentation file: created by presentation graphics programs


Database file: created by database management systems


Connectivity, Wireless Revolution and Internet


Connectivity:


Wireless revolution


Network: communication systems connecting two or more computers


Internet:


NANJING UNIVERSITY OF INFORMATION SICENCE & TECHNOLOGY


Visual Summary