# data[].attributes.body
An older standard for connecting mice and keyboards

# data[].attributes.body
A standard wired Internet access

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Used for different peripherials including digital video cameras

# data[].attributes.body
Used for connecting a widevariety of peripherials

# data[].attributes.body
an older standard for connecting hard disks

# data[].attributes.body
Connects hard disks, DVD and Blue-ray players

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Connects digital displays to dogital video sources

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Connect standard monitors to a computer or a game console

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Provides a power source in case of a mains electricity failure

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every time data is written to one disk,is is also copied to the others

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Uses multiple hard disks connected together o create a fault-tolerant system

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Designed to kep a system running if the primary system fails

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represented as bits and bytes

different formats: BPM,JPEG and PNG

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The characters represented onclude non-English alphabets

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Represents texts using the Englis Alphabet

Each byten represens a single character

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8 bits ---- 1 byte
1024B----1 KB
1024KB----1MB
1024MB----1GB
1024GB----1TB
1024TB----1TB
1024TB----1EB
1024EB----1ZB
1024ZB----1YB

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The ones and zeros are known as bits

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The computer represents the data internally as binary digits (1 and 0)

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it overwrites all dataon the hard disk with random data

# data[].attributes.body
Physically destroying the hard disk

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2 ways of removing data from a Hard Disk

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The data remain n the disk

# data[].attributes.body
Deleting a file removes  the pointer to the data from the hard disk's FAT

# data[].attributes.body
produce highr quality printouts than Inkjet printers

more expensive than Inkjet printers

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create an image by hitting the paper through an ink ribbon with a series of pins in form of shape

it's quality can be measured by the nymbers of DPI

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produce hard copies of documents and files

the speed of the printers is measured in PPM

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used on busy enviroments where a personmust absorb a lot of information at once

some feedback xan be given as audio output

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cheaper,thiner,lighter monitors than CRT

have a native resolution

a projector can be used to show the information on a grater size

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big,deep monitors that used to be on almost all desktop computers

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query the tag and retrieve its information

have a grater storage capacity than barcodes

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is attached to the surface of an item

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can be used in combination with the GPS

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they emit VHF radio signals that can be picked up and located by a receiver

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used to record the computer user

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a low resolution video camera

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can use a USB or FireWire conecction or a memory storage card

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a useful wy of inputting image,video and sound

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an Analog-To-Digital Conventer is needed to change the data from nalog to digital

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used for measuring some aspects of the physical world

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the resolution of the scanner determines the quality of the image produced

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is a device fo digitalizing a piece of paer

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an input method for speedlily reading

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have a higher storage capacity than a norma card

have a embedded procesor

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they are used to read the data stored on themagentic stripes

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uses a laser to shine light onto a barcode label

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Input device

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some have an internal Motion Sensor tha interpretsthe user's movements

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there are many different configurations available

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can also use Voice-control software in wich the user speaks commands to the comoputer operating system

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recognise words through a Voice recognition software

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often used with Voice over IPsoftware

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allows sound data to be input into the computer

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allow users to interact with computers using their hand

include support for multi-touch

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Common imut devices on laptops

Multi-touch touch pads allow more actions to be preformed using several fingers

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a large ball placed so that the user spins it to scroll through the screen

can be built-in to a computer system easily

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are the standard pointer device on most desktops   computers

Perform tasks like scrolling through documents

Some have additional buttons that can be programmed to preform different tasks

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are represented by buttons drawn on a monitor or screen

It uses a combination of hardware and software

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Each key is programmed to preform s custom function

No pre-set keys

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standard keyboards with additioanl hotkeys

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Standards keyboards present on all laptops and desktop computers

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different layouts to increase typing speed

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They are specialized computers hidden inside another devices

They are typically special purpose, programmed to preform only one type of task

They are real-time systems

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Include built in digital cameras with the ability to record video, sound and images

Can run applications downloaded from online stores

use soft keyboards

It uses high speed 3G and 4G technology for internet

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Don’t have keyboard

Screen used for touch input or handwritten recognition

Best suited to quick viewing o input of information

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laptop computes with lower specifications

have a very slow procssor, a slow amount of RAM and a low resolution screen

Hard disk replaced  by a solid state flash drive

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feature a standard keyboard, an LCD screen and a Wi-Fi Card

heat is genrated by the internal components

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they have adjustable monitors and separate keyboards and mice

use generic partswith standard interface

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optimised for high data throughput

a lot of computing power is needed

able to read large amounts of data, process it and store it quickly

# data[].attributes.body
thousanths of GB of primary storage

many TB of secondary storage

high processing speed through multiprocessing