ICT REVISION
Scanner
Input Devices
Camera
Microphone
Printer
Backups are normally stored on a storage device e.g. DVD, External Hard disk, etc...
Dual computers run at the same time. If one computer breaks, the other takes over
Output Devices
Input / Output / Storage
Speaker
Digital camera memory cards
Dual Computers
Storage
Backups should be completed once a day if the data is important
Hard disk
Backups
CD / DVD
Backups should be stored off site in a safe place Bitmap
An image made up of pixels where each pixel has its own state
Vector
Line based drawing where the instructions are stored rather than the image itself.
Types of Graphics
If the backup contains sensitive information
e.g. bank details then it should be encrypted
Addresses are read using OCR (Optical
Character Recognition) technology
Reduce the quality
Postal handling
Ways to optimise
OCR (Optical character recognition)
Limit the number of colours used
Methods of data capture
Can be done over night / at once. Employees
/ Groups are paid at the same time
Reduce the physical size of the image
Optimising / Compressing images
Batch processing
Downloads quicker on the internet
Advantages
Graphics
Payroll number
Uploads quicker to websites
Takes up less bandwidth
Employee ID
Disadvantages
Employee Number
Lose a little bit of quality
Zoom Zooms in and out of images
Key Field
Name
Cop tools Crops parts of the image
Master file
Image Tools
Payroll
Address
Rotate Used to rotate images
Brushes Acts like a virtual brush
National Insurance number
Eraser Erases parts of the image
Hours / Days worked
Tax Code
Employee Number
Ring
National Insurance Number
Transaction file
Hours / Days worked
Topologies
Tax code
Star
Buy / selling goods online
Uses
Advertise / sell goods internationally
Line
Can sell 24/7
Compare prices
Advantages
Switch
Read reviews
Input Devices
Camera
Microphone
Printer
Backups are normally stored on a storage device e.g. DVD, External Hard disk, etc...
Dual computers run at the same time. If one computer breaks, the other takes over
Output Devices
Input / Output / Storage
Speaker
Digital camera memory cards
Dual Computers
Storage
Backups should be completed once a day if the data is important
Hard disk
Backups
CD / DVD
Backups should be stored off site in a safe place Bitmap
An image made up of pixels where each pixel has its own state
Vector
Line based drawing where the instructions are stored rather than the image itself.
Types of Graphics
If the backup contains sensitive information
e.g. bank details then it should be encrypted
Addresses are read using OCR (Optical
Character Recognition) technology
Reduce the quality
Postal handling
Ways to optimise
OCR (Optical character recognition)
Limit the number of colours used
Methods of data capture
Can be done over night / at once. Employees
/ Groups are paid at the same time
Reduce the physical size of the image
Optimising / Compressing images
Batch processing
Downloads quicker on the internet
Advantages
Graphics
Payroll number
Uploads quicker to websites
Takes up less bandwidth
Employee ID
Disadvantages
Employee Number
Lose a little bit of quality
Zoom Zooms in and out of images
Key Field
Name
Cop tools Crops parts of the image
Master file
Image Tools
Payroll
Address
Rotate Used to rotate images
Brushes Acts like a virtual brush
National Insurance number
Eraser Erases parts of the image
Hours / Days worked
Tax Code
Employee Number
Ring
National Insurance Number
Transaction file
Hours / Days worked
Topologies
Tax code
Star
Buy / selling goods online
Uses
Advertise / sell goods internationally
Line
Can sell 24/7
Compare prices
Advantages
Switch
Read reviews