AS ICT All Topics
- Created by: abbie_firth
- Created on: 24-03-15 09:18
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- AS ICT Info 1
- Topic One - Health and Safety
- Eye strain – screen filters, blinds, adjustable screen
- RSI – Repe***ive strain injury, wrist supports, correctly positioned keyboard, good posture, regular breaks, ergonomic chair
- Back ache – adjustable chair, foot rest, regular breaks
- •Tired Eyes & Headaches – Using over long periods
- (Software) Appropriate font so writing is clear
- (Software) Suitable background to reduce eye strain
- (Software) Customise it
- (Software) Well explained error messages
- Must have good comfort to reduce back strain - this is by having the desk at the right height and a ergonomic chair
- (Software) Insufficient designs and bugs
- (Software) use of non-standard keys
- (Software) Badly structured menus
- Nose pollution should reduce because the equipment is noisy
- (Manufactures) They must make sure the computer screens swivel and have adjustable light
- (Manufactures) they musty make sure that keyboards have resting pads
- (Manufactores) Promote that staff should not use laptops for large amounts of datra
- Topic Two - Analysis
- Client - a person who has commissioned an ICT to produce the software as well as the person to maintain it
- User - This is a person that uses the system
- (Pr oblems) Have an interview and record with a Dictaphone so that they can replay it whenever necassary
- (Problems) They can review the current system and see any problems they are having
- (problems) View current documents of the original system and see how you could make it better
- (Problems) Create a questionnaire for clients and users to see what is wrong with *** and how they can improve it also with what they would like to be included
- Input - what you type into the system Process - searching through the system output - what is displayed and where it is displayed
- FOR EXAMPLE .... A school wants to find the amount of perople in a class: they will search the class (input) the resulkts will be searched for (processing) and the results outputted on screen (output)
- Topic Three - Design of Sloution
- Verification - This is checking the data agaisnt the orignal
- Types of verification - Double entry and proof reading
- Validation - This is checking the data is reasonable and sensible
- Types of validation
- Drop down lists - Mrs, Miss. Mr, Master etc
- Format check - checking taht the info is inthe same format for example a date is dd/mm/yyy
- Cross Field Check - This is checking that the data is reasonable e.g. cant have gender as male but ***le as Miss
- Presence check - To vheck field has the box has something written in and has been filled in
- Topic Four - Input Devices
- Keyboard
- Scanner
- Auto Number Plate Recognition
- Pointing Device/Mouse
- Touchecreens
- Magnetic stripe and chip and pin
- Speech Recotgnition
- Topic Five - Storage Device
- Floppy Disk
- Hard disk
- CD- ROM
- CD-R/W
- DVD-ROM
- DVD-RW
- Magnetic Tape
- Topic Six - Output devices
- LCD TV
- Printers
- CRTMonitor
- Television
- E-Reader
- Projector
- Thermal Printer
- Speakers
- Robotics
- Topic Seven - Software
- Operating System
- Controls the system including memory and processor
- System software
- Designed to operate the and provide and maintain a platform
- Application Software
- Designed to help the computer specific taks
- Utility Software
- Carries out some of the tasks normally included into the utility software
- Operating System
- Topic One - Health and Safety
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