HRM 3450 Lecture Notes - Lecture 26: Pci Express, Computer Hardware, Information Technology Architecture
5 May 2018
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HRM 3450 Lecture 26 Notes – Concepts of Systems
Introduction
• Our first step will be to examine the concept of systems in general.
• We will look at the characteristics and qualities that define a system.
• We will then use that basic understanding to look at the characteristics of computer-
based IT systems and show how the various elements and requirements of computer
systems fit into the system concept.
• Part 1 illustrates fundamental IT architecture concepts with several examples of IT
system architectures.
• In Part 2, we will look at the different forms the input data may take, and we will
consider the translation processes required to convert data into forms that the
computer hardware and software can process.
• You will see how the various data types that are familiar to you from programming
languages are stored and manipulated inside the computer.
• You’ll lear the ay differet ways i whih ath alulatios a e perfored, ad
the advantages and disadvantages of each.
• You will see the difference between a number and the alphanumeric representation of a
number, and understand why that difference can be critical in whether a program works
or not.
• You will be able to relate the size of a word processing text to the storage capability of
the oputer’s disk.
• In Part 3, we will take a detailed look at the various components of the hardware and
how they fit together.
• You will learn how the CPU works, how different I/O devices work, and even how text
and graphics manage to appear, seemingly by magic, on the display screen.
• You will learn what makes some computers faster and more powerful than others, and
what that means.
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