Dinesh Mirchandani University of Missouri – St. Louis Information Technology: Strategic Decision Making For Managers Henry C. Lucas Jr. John Wiley & Sons, Inc Dinesh Mirchandani University of Missouri – St. Louis Copyright 2004 John Wiley & Sons, Inc.

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The First Component: Computer Systems Chapter 13 The First Component: Computer Systems Copyright 2004 John Wiley & Sons, Inc.

The Computer Changed the World Advancement in computing Development of electronics to replace manual calculators Programs and data residing in computer memory Copyright 2004 John Wiley & Sons, Inc.

Copyright 2004 John Wiley & Sons, Inc. Types of Systems Mainframes Process transactions and maintain vital data Proprietary hardware Represent heavy investments Process large amounts of data Supercomputers Speeds of teraflops parallel computing and vector technology Mini-computers PCs Copyright 2004 John Wiley & Sons, Inc.

Copyright 2004 John Wiley & Sons, Inc. Types of Systems Client server systems Network computers Massively parallel computers Grid computing PDAs Mobile computing Copyright 2004 John Wiley & Sons, Inc.

Copyright 2004 John Wiley & Sons, Inc. Client Server Systems The quest for smaller and faster chips Large and small servers Copyright 2004 John Wiley & Sons, Inc.

Copyright 2004 John Wiley & Sons, Inc. Web Services Variety of software and programming techniques that foster integration between disparate applications Based on XML Components include Simple object access protocol (SOAP) Universal description, discovery and integration (UDDI) Web services description language (WSDL) Copyright 2004 John Wiley & Sons, Inc.

Copyright 2004 John Wiley & Sons, Inc. Trends The Semantic Web Attaching meaning to the contents of the Web Moving software to the cloud Avoiding software ownership Ubiquitous computing A world wide computer Copyright 2004 John Wiley & Sons, Inc.

Copyright 2004 John Wiley & Sons, Inc. Summary Changes in the technology force changes in hardware and software Efforts are underway to store content on the Web such that programs can interpret content meaning Trends to watch include ubiquitous computing and software distribution on the Internet Copyright 2004 John Wiley & Sons, Inc.