Introduction to Computer Systems

Июль 26, 2022

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Introduction to Computer Systems

Содержание

2. Components of Computer 1) Hard ware 2) Soft ware 3)Data 4)Use
3. Hardware System
4. Hardware Components: Peripheral Devices Equipment added to computer to enhance its functionality Modify and expand the
5. Hardware Components: Storage Devices Optical Disks CD-ROM CD-RW DVD-ROM Magnetic Disks Floppy disk Hard disk (removable
6. What is Software? Software is a set of computer instructions or data. Software receives input from
7. Software System Two categories: Operating system software, Application software
8. Software System Operating system software, also called system software, is the master controller for all activities
9. Personal Computer (PC) Designed to meet the computing needs of an individual Desktop computers Notebook computers
10. Handheld Computer Designed to fit into a pocket, run on batteries, and be used while you
11. Mainframe Computer It is a large and expensive computer that is capable of handling requests and
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Components of Computer
1) Hard ware
2) Soft ware
3)Data
4)Use

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Hardware System

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Hardware Components: Peripheral Devices
Equipment added to computer to enhance its functionality
Modify

and expand the basic computer system
Examples of peripheral devices:
Keyboard
Monitor
Mouse
Printer
Scanner
Digital Video Camera
Graphic Tablet
Joy Stick

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Hardware Components: Storage Devices
Optical Disks
CD-ROM
CD-RW
DVD-ROM
Magnetic Disks
Floppy disk
Hard disk (removable &

fixed)

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What is Software?
Software is a set of computer instructions or data.

Software receives input from the user and processes this input through the computer to produce output.
Software directs how the computer interacts with the user.
Software specifies how to process the user's data

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Software System
Two categories:
Operating system software,
Application software

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Software System
Operating system software, also called system software, is the master

controller for all activities that take place within a computer
Examples of OS software:
Microsoft Windows
Unix
Mac OS
Application software is a set of one or more computer programs that helps a person carry out a task
Examples of application software:
Microsoft Word
Internet Explorer
Macromedia Dreamweaver
Adobe Acrobat Reader

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Personal Computer (PC)
Designed to meet the computing needs of an individual
Desktop

computers
Notebook computers

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Handheld Computer
Designed to fit into a pocket, run on batteries, and

be used while you are holding it
Also called a PDA (Personal Digital Assistant)
Send and receive e-mail
Use maps and global positioning
Maintain expense account, contacts, to-do lists, memos, etc.
Make voice calls using cellular service

A personal digital
assistant (PDA)
accepts info on a touch-sensitive screen

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Mainframe Computer
It is a large and expensive computer that is capable

of handling requests and passing data simultaneously to many users.
Used by governments and large corporations to provide centralized storage and control
Processes billions of data per second and includes many units where one directs overall operations, a second one handles communication between users, and third searches for requests given by user.