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TOPIC 2 ­ SOFTWARE & HARDWARE COMPONANTS OF AN
INFORMATION SYSTEM

DIFFERENCES BETWEEN HARDWARE AND SOFTWARE:

Hardware Software
These are physical components that This is programming code (Programs
make up a computer (Monitor, such as Word Processors and DTP
Peripherals etc.). They can be physically packages) that make the computer…

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Cost Volume of data Accuracy
Keyboard

Used to enter small amounts of data due to lack of accuracy/human error.

Ergonomic*/Concept/QWERTY







*Ergonomic's are physically aligned to a more natural position reducing the chances
of Repetitive Strain Injury (RSI).

Easy to use
Concept's are customisable ­ good for restaurants as fast/efficient &…

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Barcode

Can be hand held or fixed.

Quick
Accurate
Efficient
Needs to be typed if not recognised
Difficulties if system crashes
Training is required

Optical Mark Reader

Detects the position of marks placed on the paper. The position tells the computer
the selection made by the user.

Removes human error…

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OUTPUT DEVICES


Output devices are used to display the results of computer
processing to the user. The device converts the electronically
stored data/info in to a form the user can understand.
Monitor

The larger the monitor the more suitable for DTP and CAD where the user can see
the output…

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Cheap to run, ink cartridges need only replacing but these can be expensive
Cartridges can often be refilled by companies such as Cartridge World making
them
Good quality output
Can produce high quality photo prints using photo paper
Slower printing speeds than laser
Ink can run when wet
Inks can…

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Produces accurate scaled drawings
Lines are smooth (no pixilation)
Can't produce photographic output
Slow print speeds as each line is drawn individually
Pen needs to be put to start of line each time
STORAGE DEVICES

Storage devices are used to hold data and programmes. They are nonvolatile
(they keep the…

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Large storage capacity
Disk head can crash causing data to be lost

Optical Discs

Similar to CDs. They use a laser to detect pits in the metal foil sandwiched between
two clear plastic disks. Used by manufacturers to supply software to customers and
archive image files.

CDROM (Compact Disc ­…

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Devices to help the motor impaired:
Mouth stick
Puffsuck switch
Tongue activated joystick
Eyetyper (attached to muscles around eyes)
Foot Mouse

SPECIALIST SOFTWARE

Texttospeech
Speechtotext
Auditory feedback (plays sounds in response to activity)
Screen Magnifier
Predictive Text
Sticky Keys (aids people who can't hold down more than one button at…

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Sending output to a display screen or printer
Keeping track of data files stored on the hard disk (saving and
retrieving)
USER INTERFACE

The user interface is the means by which a user can
interact with an application or operating system

Different types of user interface:

Menu (fig 1) On…

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Operating systems can also be termed as:

GUI (Graphic User Interfaces) An interface based on graphics rather
than text
WIMP (Windows Icon Menu Pointer) This is a particular type of GUI ­ not all
GUI's use windows, icons, menus etc


Utility Software

A Utility programme is a small programme that…

Comments

Ibrahim - Team GR

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Good content and covered in good detail. Could have added colour but its great for revision! Thanks!!

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