Briefly describe the following:
1. Difference between Internet, Intranet and Extranet.
2. E-sourcing and E-procurement
3. How might managers use SWOT analysis to identify new applications for electronic commerce in their strategic business units?
4. The similarities and differences between XML and HTML.
5. Define "direct materials" and "indirect materials." List the reasons that a large company would have two separate departments to manage the purchasing of each.