LECTURE #1

Presented ByMrs.Vasanthi Muniasamy

INFORMATION SYSTEM

A combination of HardwareSoftwareInfrastructure and Trained personnel

organized to facilitate PlanningControlCoordination and Decision Making

in an organization.

DEFINITION:

Executive Support System (ESS)

Management Information System

(MIS)

Decision Support System (DSS)

Knowledge Management System (KMS)

Transaction Processing System (TPS)

Office Automation System (OAS)

TYPES OF INFORMATION SYSTEMS

An Executive Support System ("ESS") is designed to help senior management make strategic decisions.

Executive Support System

A management information system (“MIS”) is mainly concerned with internal sources of information and summarizes it into a series of management reports.

Management Information System

Decision-support systems ("DSS") are specifically designed to help management make decisions in situations where there is uncertainty about the possible outcomes of those decisions.

Decision Making System

Knowledge Management Systems ("KMS") exist to help businesses create and share information.

Knowledge Management System

Transaction Processing Systems ("TPS") are designed to process routine transactions efficiently and accurately.

Transaction Processing System

Office Automation Systems are systems that try to improve the productivity of employee who need to process data and information.

Office Automation System

Basically there are 5 components available.HardwareSoftwareDataProceduresPeople

Components of Information System

The term hardware refers to machinery. This category includes the computer itself, which is often referred to as the central processing unit (CPU), and all of its support equipments.

Hardware

The term software refers to computer programs and the manuals (if any) that support them.

Software

Data are facts that are used by programs to produce useful information.

Data

Procedures are the policies that govern the operation of a computer system.

Procedures

People mean the end user of the Systems. Every CBIS (Computer Based Information System) needs people if it is to be useful.

People