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Chapter 5

COMMERCE 2KA3 Chapter Notes - Chapter 5: Digital Equipment Corporation, Midrange Computer, Decentralized Computing


Department
Commerce
Course Code
COMMERCE 2KA3
Professor
A L I R M O N T A Z E M I
Chapter
5

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Commerce 2KA3
Chapter 5: IT Infrastructure and Emerging Technologies
Information Technology (IT) Infrastructure: the shared technology resources that
provide the platform for the firms specific information system applications. Includes
hardware, software, and services such as consulting, education, and training- that are
shared across the entire firm or across entire business units in the firm
Evolution of IT Infrastructure
Mainframe: 1959 to present, the introduction of the IBM 1401 and 7090 transistorized
machines in 1959 marked the beginning of widespread commercial use mainframe
computers. Mainframe computers became powerful enough to support thousands of online
remote terminals connected to the centralized mainframe using proprietary
communication protocols and proprietary data lines.
- Period of highly centralized computing under control of professional programmers
and system operators
Minicomputers: produced by Digital Equipment Corporation (DEC) in 1965, these
computers offered powerful machines at far lower prices than IBM mainframes, making
possible decentralized computing. iN more recent years the mini computer has evolved
into a midrange computer or midrange server and is part of a network
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