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information and knowledge

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Premila Mogantas

on 10 May 2010

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Transcript of information and knowledge

Data, Information, Knowledge
and Processing Software Physical equipment that makes up a computer Programes, routines and procedure which can be run on a computer Hardware Input: Keyboard, Mouse, Scanner Output: Monitor, Speakers Backing storage: Hard disk, USB memory Communication: Modem, Router Operating system, utilities, system
software Storage Devices Store data that is not currently
being processed Non volatile storage of programes and
data Sometimes referred to as secondary
store or mass storage Software Standardisation Output may appear different
e.g. webpages viewed on different systems Different layout, resolution of images Standardisation of file format e.g. importing
and exporting of data between applications Hardware Standardisation Different connectors Different power requirements in different
countries Size difference-HDD heights Devices to help the moto
impaired (hardware) A mouth-stick: a stick to control the iput controlled with the mouth A puff-suck switch: a tube placed in the mouth
and sucked through A eye-typer: a device that fits onto the muscels around the eye and when the eye is moved a pointer on the screen moves A foot mouse: a mouse that is controlled by the foot Devices to help the visually
impaired (hardware) A braille keyboard: a keyboard with braille dots
on the keys A microphone: an input device used with voice
recognition software A loudspeaker: an output device for hearing signals
and text read out for someone who
cannot see it A braille printer: an imapct printer that can create
braille on a page Different types of software Operating System: is the core software on which programs
depend. there are many different operating
system e.g. windows Utilities: additional programs to make the use of the computer easier e.g
printer monitoring software, virus checkers, file compression User Interface: is the means by which the user can interact with an
application or operating system e.g. menu, form,
pointers, icon Application Software: These are programs that allow the computer
to be used to solve particular problems or
perform tasks e.g. word processor,
spreadsheets, database Characteristics of different
user interfaces Command line: types commands at a prompt, can use
switches, low memory overheads but specialist
kowledge required Forms: Structured areas for response, validated and logical Menus: drop down, pop-ups and context sensitive, can
be part of WIMP Natural language: written or spoken everday
language, computer translates
into commands needed to
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