Chapter 2

Mind Map by ebanks.amber, updated more than 1 year ago
Created by ebanks.amber almost 7 years ago


ICT (Chapter 2) Mind Map on Chapter 2, created by ebanks.amber on 04/14/2013.

Resource summary

Chapter 2
1 Differences in hardware and software
1.1 Hardware: things you can you touch
1.2 Software: programming code that makes the computer work
1.2.1 System software: control the workings of the computer
1.2.2 application software (word-processing programs, spreadsheets etc
2 Lack of Standardisation
2.1 Increased COST for parts and upgrades
2.2 Limited AVAILABILITY of hardware which will effect the cost
2.3 Limited and expensive TECHNICAL SUPPORT
2.4 Causes difficulties and expenses for TAKEOVERS
2.4.1 incompatible computer systems having to purchase new equipment staff needing new training no communication between systems
3 Input, output and storage devices
3.1 Input devices
3.1.1 Keyboard + good for inputting small quantities of data Concept keyboard: allows you to create you own keys
3.1.2 Mouse Pointing device used to select items on a screen - needs some surface area to operate
3.1.3 Scanner Translates information into a form the computer can use + lots of different types (bar code/OMR/magnetic card reader etc)
3.1.4 Graphic tablet can manipulate images on screen/create free-hand drawings
3.1.5 Digitiser converts analogue to digital data
3.2 Output devices
3.2.1 Monitor takes signals on a computer and displays them on a screen
3.2.2 Printer Produce a hard copy output + lots of different types (dot matrix/inkjet/laser)
3.2.3 Plotter produces printouts using vector or coordinate graphics Flat-bed: stays still and pen moves Drum plotter
3.3 Storage devices
3.3.1 Hard disks + portable hard disks allow large amounts of data to be transferred easily
3.3.2 Optical disks CD-ROM available in fixed or forms which can be rewritten around 700mb DVD around 4.7gb
3.3.3 tape drive large storage capacity
3.3.4 Memory sticks
4 Specialist hardware devices
4.1 Visually impaired
4.1.1 braille keyboard
4.1.2 microphone
4.1.3 loudspeaker
4.1.4 braille printer
4.2 Motor imapired
4.2.1 mouth-stick a stick to control input with the mouth
4.2.2 puff-suck switch a tube placed in the mouth and blown/sucked through
4.2.3 tongue-activated joystick
4.2.4 eye-typer fits onto the muscles around the eye and when the eye is moved a pointer on the screen moves
4.2.5 foot mouse
5 Specialist software
5.1 screen reader
5.1.1 program that reads out a computer display
5.2 text-to-speech system
5.2.1 takes written text and outputs is using a speech synthesiser
5.3 speech-to-text system
5.3.1 takes spoken words and inputs them into the computer
5.4 Auditory feedback system
5.4.1 plays sounds in response to user activity
5.5 screen magnifier
5.5.1 zooms in on portions of the screen
5.6 predictive text
5.6.1 suggests the required word
5.7 sticky keys
6 Different types of software
6.1 Operating system
6.1.1 controls the allocation and use of hardware resources
6.2 User interface
6.2.1 means by which the user can interact with an application
6.2.2 menu: on-screen list of options
6.2.3 form: on-screen form to enter data
6.2.4 command line: space to type instructions
6.2.5 natural language: a voice-based interface
6.3 Utility
6.3.1 assists in monitoring and maintaining a computer system
6.3.2 e.g. virus checkers/printer monitoring software
6.4 Application software
6.4.1 allows the computer to be used to perform particular tasks for the end user
6.4.2 e.g. word processors/spreadsheets
7 Characteristics of different user interfaces
7.1 Command-based
7.1.1 user types instructions at a command prompt to control what the computer does
7.1.2 - need good knowledge of the commands and the effects
7.2 Forms
7.2.1 limited area on screen with boxes to fill in
7.3 Menus
7.3.1 series of related items that can be selected
7.4 Natural Language
7.4.1 allow the users to use their own language to communicate with the computer
7.4.2 spoken interface: typified by voice recognition software
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