Provide the names of the companies identified in each

Question

Identify two (2) Vertical Exchanges

or

Identify two (2) Horizontal Exchanges

or

Identify two (2) Web Portals

1. Provide the names of the companies identified in each marketplace
2. Describe the exchange (e.g., line of business, typical participant, etc.)
3. Identify any special rules required to conduct business within the exchange or required to become a member of the "marketplace".
4. Identify one (1) or more applications of e-procurement that may be applicable to the marketplace you are reviewing.

Summarize all of the above (points 1-4) in an executive summary/overview paper. You must at least have 1 1/2 pages to fully explain all 4 elements above.