IT KNOWLEDGECA Professional Stage - Knowledge Level, ICABTutor: Mohammad Abdul Matin

Chapter 2Information Technology Architecture

Chapter Outline Information System Computer System Data Structure Database Management System Processing Technique Security Control E-Commerce

Information SystemWhat is Information System? A set of interrelated components that

process, store and distribute information to support decision making and control in an organization.

Types of Information System From Functional Perspective– Sales Management– Production Planning– Accounting– HR Management, etc.

From Constituency Perspective– Enterprise Support System (ESS)– Decision Support System (DSS)– Management Information System (MIS)– Transaction Processing System (TPS)

Computer SystemWhat is a Computer System?

As mentioned in the manual: Collection of some integrated components that

works to accomplish a specific task.

Little Revised: Collection of some integrated, logically related

components that works together to accomplish programed computations helping to complete specific tasks.

Properties of a Computer SystemMust satisfy the following:– Consists of several components– Logical relations between (among)

components– Controlled in a way that a specific task is

accomplished.

Components of a Computer System Hardware– Motherboard– Central Processing Unit (CPU)– Random Access Memory (RAM)– Basic Input Output System (BIOS)– Power Supply– Video Display/Processing Controller– Compute Bus– Drives (CDROM, DVD, Floppy, Hard Drive, SSD,

USB, etc.)

Components of a Computer System Software

System Software• System Management Software (OS, Network OS, DB)• System Support Software (Utility, Performance Monitoring,

Security)• System Development Software (Programming Editor/IDE,

Program Translator, Computer Aided Software Engineering (CASE)

Application Software• Word Processing, Spreadsheet, Database Management,

Multimedia• Enterprise Applications (ERP, CRM, WMS, HCM, etc.)• Educational (CBT, Whiteboard, Treehouse, etc.)• Simulation (3D Designers, Flight Simulation, etc.)• Content Access Applications (e.g. web browser applications)

Components of a Computer SystemSoftware types from Commercial Perspective– Commercial Software

• Generally proprietary / copyrighted (e.g. MS Office)• Can be downloadable (e.g. Adobe Acrobat Professional)• Can be used over the cloud (e.g. MS Office 365)

– Freeware / Open Source Software• Generally free and without support• Sometimes can have price for any extended that

becomes necessary• Can be sometime limited featured

– Shareware Software• Try before you buy

Components of a Computer System Human ware– User Interface– User Experience– User Behavior

Data / Information– Firmware (e.g. BIOS)

Exam Questions What is Information System? Classify

Information System. What is Computer System? What are the

components? What is Software? Classify according to

working principles / commercial perspective. What is shareware? What is firmware?

Thank You

Next ClassTopics: Continue on Chapter 2