Business Information System: Entity Relationship Diagram and Impact of Information System on City College

Business information
system

Introduction
 Information systems are simple, socio-technical, formal organizational systems that are
mostly designed to process, collect, store and distribute information across all the
functional department of an organization.
 These systems are composed of four things, those are: technology, people, structure,
task. These systems are used for various purposes such as: used to computerize
database, study and analyse all the information related to the organization, for
interpretation of information etc.
 This presentation is based on Business information system in which Entity Relationship
diagram will b drawn and explained of Library management system of City College
with All the entities and attributes specified clearly, impact of introducing information
system to an institute like City College.

Entity Relationship Diagram
 ER Diagram is used to show relationship between all the entity sets stored in a database
with all the attributes related to all the entities. An entity is an object and entity set is
collection of similar entities.
 By showing all the entities and their attributes logical structure of the database is
explained.
 ER diagram is completely based on representing all the needs of a business in order to
perform all the business functions or processes smoothly.
 In ER diagram an entity is represented in form of a rectangle and attributes are
properties of entities and are represented by ellipses.

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 Here Entity relationship diagram of Library management system for City College has
been described and explained.
 This Library Management System has five main entities such as: books, authors,
members, fine, reservations.
 All the entities are connected to each other showing all the relationship between them.