Electronic Commerce Unit 3 B2B Electronic Commerce Unit 4 B2C Electronic Commerce Unit 5 C2C Electronic Commerce Unit 6 Electronic Payment Unit 7 Electronic Commerce Logistics Unit 8 Internet Marketing Unit 9 Search Engine Unit 10 Customer Relationship Management Unit 11 Electronic Commerce Security Unit 12 Web Site Development Unit 13 Electronic Commerce Careers Unit 14 Internet Job Market Glossary Abbreviations Web Sites