ICT Revision

ICT Revision

1. Data Protection Act

   • 8 Principles: Data should....
     • Be Fairly and lawfully processed
     • Be Processed for limited purposes
     • Be adequate, relevant and not excessive
     • Be accurate and up to date
     • Be kept for a limited time
     • Be Processed in your line of rights
     • Be securely held
     • Not to be transferred to other countries outside the E.U. that do not have adequate data protection
   • Basic Info
     • Doesn't protect personal data but does protect the rights of the owners of the personal data
     • If the data hasn't been complied with the 8 principles, the owner of the data has the right to complain and claim compensation

2. Bar-Codes

   • Advantages
     • Cheap to Use for products
     • Automatically updates the stores database when the product@s barcode is scanned
   • Disadvantages
     • The code can break and become faulty, causing the computer to read the code wrong or not at all
     • The barcodes may become corrupt and have to be entered in manually, wasting time
     • The barcode doesn't hold a lot of information about the product
     • The barcode has to be manually scanned to update the database/system
   • How it Works
     • 12 numbers in the barcode
       • 1st number-Product Type
       • 2nd-6th number-Manufacturer code
       • 7th-11th number- Product Code
       • 12th number- Check Digit
     • Has a quiet zone to determine the speed of the scan
     • Each section of 7 bars/gaps represents a number
     • The scanner reads the code, converts it into a number and retrieves the information linked to that number

3. RFID Tags

   • Advantages
     • Can be read from up to 100ft
     • Carries more information than a bar code
     • Transfers data faster than a barcode
     • Automatically updates the system/database without the need of manually scanning it
   • Disadvantages
     • More expensive to use than a barcode
   • How it Works
     • 3 main parts
       • Antenna
       • Transponder
       • Receiver
     • The scanner reads the signals emitted from the RFID Tag
       • Data is transmitted along these signals
   • Radio Frequency Identification Tags