Introduction toInformation System

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What is it?According BussinessDictionary.com information system is a combination of hardware, software, infrastructure and trained personnel organized to facilitate planning, control, coordination and decision making in an organization.

Information system is a such as one in the opening scenario are combinations of hardware, software, and telecommunications networks that people build and use to collect, create an didtribute useful data especially in organizational settings . (Information Systems Today : Why is Matter? Second Edition).

Types of IS

Manual (paper/pencil) information system Informal (word to mouth) information systemFormal (writen procedures) information systemComputer Based Information System

THIS COURSE MAINLY FOCUSES ON COMPUTER

BASED INFORMATION SYSTEM (CBIS)

Figure 1.0 An information system is a combination of five key elements : people, hardware, software, data and telecommunications networks. (Information Systems Today : Why is Matter? Second Edition)

Components

Components

Make people easily do their workReal time updatingImprovement of quality care of organization

Help the user to store large amount of information

Has made possible for business to be open 24x7 all over the globe

The creation of new and interesting jobs

Advantages

CostlySystem or network breakdown or shutdownPrivacy issues

Disadvantages

Information System terms:

•Computer• Internet•Web Pages•Networks•Databases•File Management•Virus Protection•Backup/Restore

Information System terms:

ComputerA computer is a general

purpose, programmable device or electronic machine that is used for the production and processing of information

capable of calculating and storing results

Information System terms:

Components of a Computer System:

Hardware – the physical partsSoftware - the instructions or programs that control the hardware

The Human Being – the brains behind the whole system!

Information System terms:

Internet It’s a worldwide network of

computers that allows the "sharing" or "networking" of information at remote sites from other academic institutions, research institutes, private companies, government agencies, and individuals.

It allows people to send and receive data wherever they are in the world if they have internet access

Information System terms:

Web PagesWeb pages are what make

up the World Wide Web. These documents are written in HTML (hypertext markup language) and are translated by your Web browser.

Information System terms:

NetworksA network is a group of two

or more computer systems linked together.

TYPES:LANsWANsCANsMANsHANs

Information System terms:

local-area networks (LANs): The computers are geographically close together (that is, in the same building).

wide-area networks (WANs): The computers are farther apart and are connected by telephone lines or radio waves.

campus-area networks (CANs): The computers are within a limited geographic area, such as a campus or military base.

metropolitan-area networks MANs): A data network designed for a town or city.

home-area networks (HANs): A network contained within a user's home that connects a person's digital devices.

TYPES:

Information System terms:

File ManagementThe operating system provides an organizational structure for the computer’s contents

Hierarchical structure of directoriesDrives FoldersSubfoldersFiles

Information System terms:

Information System terms:

DatabasesA database is a collection of

information that is organized so that it can easily be accessed, managed, and updated. In one view, databases can be classified according to types of content: bibliographic, full-text, numeric, and images.

Information System terms:

Virus ProtectionVirus protection software is

designed to prevent viruses, worms and Trojan horses from getting onto a computer as well as remove any malicious software code that has already infected a computer. Mostvirus protection utilities now bundle anti-spyware and anti-malware capabilities to go along with anti-virus protection.

Information System terms:

Backup/Restore• What might cause you a need to recover?

• Unintended deletion of a database object (rows, columns, tables). • Unintended deletion of a server object (databases, chunks, dbspace). • Data corruption or incorrect data created. • Hardware failure (such as when a disk that contains chunk files fails). • Database server failure.• Natural disaster.

• What to backup ?• Depending on the recovery plans.