Difference Between Electronic Market and IOS

	IOS	E-Market
1	IOS may use private or publicly accessible network.	E-Market may use publicly accessible network.
2	Customer supplier relationship is determined in advance. It is expected that it is ongoing relationship for multiple transaction.	Two types of relationship (i) Customer to seller linkage is established at time of transaction for one time only.  (ii) Customer seller linkage is established for a fixed time period.
3	Agreements on nature and format of business document.	Sellers market maker determine which transaction they will provide.
4	Advance arrangements are made so that both parties know which communication network will be used for system	Customer and seller independently determine which communication network they will use.
5	Joint guidelines are formulated so that each party will know how system is used.	No joint guideline are formulated in advance.

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