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8/6/2019 Different of Computer
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PCThe personal computer (PC) defines a computer designedfor general use by a single person.
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D
esktop A PC that is set up in a permanent location(notportable).
Most desktops offer more power, storage andversatility for less cost than their portable
brethren.
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Laptop Also called notebook. Laptops are portable computers that integrate
the display, keyboard, a pointing device ortrackball, processor, memory and hard drive all
in a battery-operated package slightly largerthan an average hardcover book.
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Palmtop More commonly known as PersonalDigital
Assistants (PDAs), palmtops are tightly integratedcomputers that often use flash memory instead of a
hard drive for storage. These computers usually do not have keyboards but
rely on touchscreen technology for user input.
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WorkstationA desktop computer that has a more powerful
processor, additional memory and enhancedcapabilities for performing a special group oftask, such as 3DGraphics or gamedevelopment.
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ServerA computer that has been optimized to provideservices to other computers over a network.Servers usually have powerful processors, large
memory and hard drives.
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Minicomputer Another term rarely used nowadays.Minicomputers fall in between microcomputers(PCs) and mainframes (enterprise servers).
Minicomputers are normally referred to as mid-range servers now.
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Mainframe In the early days of computing,
mainframes were huge computersthat could fill an entire room or even
a whole floor. The size of computers has
diminished while its power hasincreased, the term mainframe hasfallen out of use in favor ofenterprise server.
The huge machines processingmillions of transactions every day.
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Supercomputer This type of computer usually costs hundreds of
thousands or even millions of dollars. Although some supercomputers are single
computer systems, most are comprised of
multiple high performance computers working inparallel as a single system.
The best known supercomputers are built by CraySupercomputers.
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Wearable The latest trend in computing is wearable
computers. Essentially, common computer applications
(e-mail, database, multimedia,
calendar/scheduler) are integrated intowatches, cell phones, visors and even clothing.
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Computer Parts andComponents
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Input devices are any electronic devicesconnected to a computer that product input
signals
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Text Graphics
videoAudio
PointingDevice
5 Types
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Keyboard- to enter data (text) andcommands
Virtual Keyboard (on the screen)- to enter data and commands
Optical Reader & Barcode Reader- to converts characters, marksand codes into digital data
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Scanner- captures image
Digital Camera
- take picture
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Microphone- to enter sound
Midi Keyboard- to enter music
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CCTV
Webcam
Digital Video Camera
To capture motion images
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Mouse Trackball
Graphics Tablet TouchScreen
To input spatial data
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Output Devices
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An output device is hardware that is capableof delivering or showing information to one or
more users. An output device displays, printsand presents the results of a computers work.
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A display device is an output device thatvisually conveys texts, graphics and videoinformation.
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A monitor is an example of an output devicethat can be used to display texts, graphics andvideos.
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A Liquid Crystal Display (LCD) projectorprojects what is displayed on the computer ona wall or projection screen.
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A printer is an output device that prints text andgraphics on a physical medium such as paper ortransparency film.
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A photo printer is a colour printer that producesphoto quality pictures.
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An audio output device produces music,speech, or other sounds.Examples of output devices are speakers,
headphone and woofer.
Speaker Headphone Woofer
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A pair of speakers is an audio output device thatgenerates sound.
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The headphone is a pair of small speakersplaced over the ears and plugged into a porton the sound card.
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A woofer or subwoofer is used to boost thelow bass sound and is connected to the porton the sound card.
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What Is Computer Storage?
Information and computer storage is thedocument are stored in storing of data in ancomputer storage so electromagnetic form tothat it can retrieved be accessed by a whenever
they are computer processor needed later on.
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Types of Computer Storage
1. Primary storage2. Secondary storage
PrimaryStorage
Primary storage is the main memory in acomputer. It store data and programs that canbe accessed directly by the processor.
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Types of Computer Storage
TypesOf Primary Storage
There are two types of primary storage which are
RAM and ROM
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Secondary storage is another alternativestorage to save your work and documents. It isvery useful to store programs and data for
future use. It is non-volatile, which means thatit does not need power to maintain theinformation stored in it. It will store theinformation until it is erased.
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Harddisk
Diskette
Removabledrive
Compact
Disc
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User will input the data to be processed by
the processor.
The storage holds databases, files and
programs.
The output devices present the processed
data as useful information products for the
user.
Computer Parts & Components
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INPUT
PROCESSOR
STORAGE
Overview of ComputerSystems
OUTPUT