Host Integration Server (HIS) 2000 is a member of the Microsoft
.NET Enterprise Server family, which also includes SQL Server
2000, BizTalk Server 2000, Exchange 2000 Server, Application
Center 2000, Internet Security and Acceleration (ISA) Server
2000, Commerce Server 2000, and Mobile Information Server 2001.
This product family, in which HIS 2000 plays an important role,
provides a new platform that lets organizations better use the
Internet for their e-business. HIS 2000 integrates the Internet
and legacy mainframe and AS/400 systems. For example, Figure A
illustrates a company's e-commerce infrastructure that uses HIS
2000 and other .NET servers. Suppose the company accepts a
customer order from the company's Web site. The business-to-
consumer (B2C) order application on Commerce Server 2000 handles
this order transaction, validates the customer's purchase order
(PO) and credits, then puts the order request into the PO
transaction system on SQL Server 2000. Through the COM
Transaction Integrator (COMTI) in