HRM 3450 Lecture Notes - Lecture 11: Central Processing Unit, Block Diagram
5 May 2018
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HRM 3450 Lecture 11 Notes – The Hardware Component
Introduction
• The most visible part of the computer system is obviously the hardware that makes up
the system.
• Consider the computer system upon which you write and execute your programs.
• You use a keyboard and mouse to provide input of your program text and data, as well
as for commands to the computer.
• A display screen is commonly used to observe output.
• A printer is frequently available as an alternative output to the screen.
• These are all physical components.
• Calculations and other operations in your program are performed by a central
processing unit (CPU) inside the computer.
• Memory is provided to hold your programs and data while processing is taking place.
• Other input and output devices, such as a disk and SD plug-in cards, are used to provide
long-term storage of your program and data files.
• Data and programs are transferred between the various input/output devices and
memory for the CPU to use.
• The CPU, memory, and all the input, output, and storage devices form the hardware
part of a computer system.
• The hardware forms the tangible part of the system.
• It is physical—you a touh it, whih is what the word tagile eas.
• A typical hardware block diagram for a computer is seen
• In addition to the input and output devices shown in this diagram, lists some other input
and output devices that are frequently seen as part of computer systems.
• The diagram in actually applies equally well to large mainframe computers, small
personal computers, and even devices with computers embedded in them, such as
PDAs, iPods, GPSs, and cell phones.
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