Presentation on Components of Information system

Information System (IS) An information System (IS) is a collection of components that work together to provide information to help in the operations and management of an organization.

Types of Information System There are different types of Information system- Individual Information System. Workgroup Information System. Organizational Information System. Inter organizational Information System. Global Information System.

Information System Components  Hardware  Software  Stored data  Personnel  Procedures

Hardware of Information System Input and Output device. Input- - Keyboards - Pointing Device - Others Output- - Screens - Printers - Others

Hardware of Information System TTTTerminals (input and output combined). MMMMultimedia input and output. VVVVirtual reality input and output.

Hardware of Information System Primary Storage RAM (Random Access Memory). ROM (Read Only Memory). ROM is non volatile storage

Hardware of Information System Central Processing Unit (CPU) »Micro computer »Mini computers »Mainframe computers »Super computers

Hardware of Information System Secondary Storage Secondary Storage Magnetic disk (also called a disk) Magnetic disk (also called a disk) Optical disk (CD) Optical disk (CD) Magnetic tape (also called tape) Magnetic tape (also called tape)

Hardware (cont’d)  Secondary storage examples

Hardware of Information System Types of computer systems- Types of computer systems- Personal computer systems. Personal computer systems. Multiple-user computer systems. Multiple-user computer systems. Networked computer systems. Networked computer systems.

Software of Information System T Types of software S System software O Operating systems U Utilities C Communications software A Application software

Software of Information System  Application software

Software of Information System  Application software  Individual application software  Word processing  Spreadsheet  Browser  Workgroup application software  Electronic messaging  Electronic conferencing

Software of Information System Application software Organizational application software Inter organizational application software EElectronic data interchange-EDI

Software of Information System T Types of software ( According to Source) P Packaged software urchased from Market C Custom software Created by Programmers

Stored Data of Information System  Data is kept in the computer system.  Data used by software.  Data does NOT include input and output data.  Data stored in secondary storage until needed.  Data can represent facts, numbers, words, images, pictures, sounds.  Data is usually composed of characters, letters, numbers, special symbols.

Stored Data of Information System

Personnel of Information System Personel means usears of information system Personel means usears of information system Personel supply input data Personel supply input data Personel receive output data or information Personel receive output data or information

Personnel of Information System Operating Personnel Operating Personnel Run hardware and software. Run hardware and software. Enter input data for, and pass output data and information to user. Enter input data for, and pass output data and information to user. Operate computers and execute programs. Operate computers and execute programs.

Procedures of Information System  Procedures of information System are the instructions that tell people how to use and operate the system (system documentation)

Procedures of Information System Procedures Can be Input instructions Input instructions Expected output Expected output How to operate the hardware and software How to operate the hardware and software Instructions to recover from errors Instructions to recover from errors

Application of Information System  Electronic messaging  Information sharing  Document sharing ocument conferencing  Audio conferencing  Video conferencing

Application of Information System Electronic conferencing Electronic meeting support Group calendaring and scheduling Workflow management

Application of Information System  Direct uses in business  Sales & marketing  Manufacturing  Finance  Accounting  Human resources

Management support information systems Management information systems Decision support systems Executive support systems Expert systems

Information Systems Benefits Providing better information for better decision making Improving service for customers Improving productivity to allow people to accomplish more in a period of time.

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