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4
Contents
Contents
1 Defining Information Systems 7
1.1 Defining Data and Information 7
1.2 Defining Systems 8
1.3 Defining Information Systems 8
1.4 Business Information Systems 8
1.5 Types of business information system 9
2 Hardware 10
2.1 Input devices 10
2.2 Central Processing Unit (CPU) 10
2.3 Internal and External Memory 10
2.4 Output devices 10
2.5 Major categories of computers 11
3 Software 12
3.1 Systems software 12
3.2 Application software 13
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Contents
4 Database Systems 14
4.1 Organising data in a database 14
4.2 Database Software 14
4.3 Retrieving Data from a Database 15
4.4 Business Intelligence 15
5 Networks 16
5.1 Network components 17
6 The Internet and World-Wide Web 19
6.1 Web-Enabled Business 19
6.2 Intranets and extranets 19
6.3 The World Wide Web 20
6.4 Web browsers and servers 20
6.5 E-business 20
6.6 E-commerce 21
7 Acquiring Information Systems 22
7.1 Bespoke development 22
7.2 Off-the-shelf software 23
7.3 End-user-developed software 23
7.4 Factors affecting software acquisition 24
© Deloitte & Touche LLP and affiliated entities.
360° thinking .
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© Deloitte & Touche LLP and affiliated entities.
360° thinking .
Discover the truth at www.deloitte.ca/careers
© Deloitte & Touche LLP and affiliated entities.
360° thinking .
Discover the truth at www.deloitte.ca/careers
© Deloitte & Touche LLP and affiliated entities.
360° thinking .
Discover the truth at www.deloitte.ca/careers
Download free eBooks at bookboon.com
Click on the ad to read more Business Information Systems
6
Contents
8 Developing Information Systems 26
8.1 The systems development life cycle 26
9 Systems Development Methodologies 31
9.1 SSADM 31
9.2 Rapid applications development (RAD) 35
9.3 The spiral model 37
9.4 The Capability Maturity Model 37
10 Information Systems Security 39
10.1 Security Threats to Information Systems 39
10.2 Reducing the Threat to Information Systems 43
10.3 Types of controls 46
10.4 Techniques for controlling information systems 48
10.5 Security Threats to Internet services 51
Bibliography 54
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