1. April 20023CSG11 Electronic Commerce Introduction John Wordsworth Department of Computer Science The University of Reading J.B.Wordsworth@rdg.ac.uk Room 129, Ext 6544

2. April 20023CSG12 Lecture objectives  Understand how the course works and where to find the materials.  Describe how electronic commerce changes the relationship between customers and suppliers.  List some of the technologies appropriate to e- commerce systems.  Describe the place of the Internet and TCP/IP in electronic-commerce.

3. April 20023CSG13 How the course works  Web page at www.rdg.ac.uk/~sis00jbw/jbwec1.html  Basic ideas of e-commerce  Software technologies for e-commerce  Lectures  Other sources  Self-assessment questions  Examination

4. April 20023CSG14 Some books  Ince: Developing Distributed and E-commerce Applications. Addison Wesley, 1st edition, 2002, ISBN 0-201 73046-4  Chan, Lee, Dillon, Chang: Electronic Commerce: Fundamentals and Applications. John Wiley & Son Ltd., 1st edition, 2001, ISBN 0-471-49303-1

5. April 20023CSG15 Old-style commerce Customer Send order Send payment Supplier Look up stock Pick from shelf Update stock Create invoice Note payment order book and invoice cheque

6. April 20023CSG16 Electronic commerce Customer Search catalogue Choose some books Give CC details Print order details Supplier Review orders Pick from shelf Send book Confirm payment request book list order acknowledge CC details book

7. April 20023CSG17 Levels of privacy private public

8. April 20023CSG18 Naïve views of electronic commerce BuyerSeller BuyerRetailerWholesaler BuyerBroker Seller

9. April 20023CSG19 Three-tier architecture Web browserapplication serverdatabase server presentationbusiness logicdata mgmt HTML JavaScript ECMAScript applets CGI JSPs servlets ASPs EJBs ADOs

10. April 20023CSG110 Four-tier architecture mobile phoneapplication servergateway presentationbusiness logic WML WMLScript CGI JSPs servlets ASPs EJBs ADOs conversion

11. April 20023CSG111 The Internet and TCP/IP host address port number Well-known ports:  21 FTP  23 telnet  80 HTTP 2130 2131 132.213.123.231 21 23 80 123.231.132.213 serverclient

12. April 20023CSG112 A layered architecture for communications Application Presentation Session Transport Datalink Network HTTP Physical HTTP TCP IP subnetwork TCP/IP family OSI

13. April 20023CSG113 Key points  Refer to the Web page from time to time.  There are lectures, supplementary reading, and self- assessment exercises to attend to.  Electronic commerce changes the relationship between customers and suppliers.  Electronic commerce has many forms.  There are many technologies that we might study: only a few have been chosen.  The basis of e-commerce communications is the Internet, and TCP/IP.