1. Data Capture F451 - AS Computing

2. Data and Information Data –Raw Facts and Figures –No structure or context Information –Structured, Organised Data –Processed Data

3. A Good Example

4. BarcodesBarcodes Barcode (Data) is scanned - Input Data Capture Data is Processed The price and item name is the Output

5. How can computers gather data? SensorsSensors Magnetic stripsMagnetic strips Smart cardsSmart cards BarcodesBarcodes Magnetic ink character recognition (MICR)Magnetic ink character recognition (MICR) Optical mark recognition (OMR)Optical mark recognition (OMR) Optical character recognition (OCR)Optical character recognition (OCR) Voice recognitionVoice recognition

6. Input/Output Devices Example Supermarket Checkout Input Devices –Barcode Reader –Scales –Chip & Pin Reader –Touch Screen

7. Input/Output Devices Example Supermarket Checkout Output Devices –Screen –Receipt Printer –Speaker

8. Use of Barcodes Thickness of each line represents number that corresponds an item in the storeThickness of each line represents number that corresponds an item in the store Each item has a unique numberEach item has a unique number Number is looked up on a central database to find the item name and priceNumber is looked up on a central database to find the item name and price

9. Reading a Barcode Laser/Infra red beam used to detect thickness of each line Barcode numbers usually have start/stop lines and a check digit

10. Databases in Barcode Systems Scanned number of barcode is looked up on stock database Stock can be incremented/decremented automatically when barcodes are scanned. Automated stock control systems. Real time systems. Always upto date. Used in warehouses, supermarkets

11. Operating a Computer INPUT PROCESS OUTPUT

12. MICR – Magnetic ink recognition Printed at the bottom of a cheque Can be read at very high speeds Read with 100% accuracy

13. Optical mark recognition Machines read pre-printed sheets and check for marks in certain places on them Used for: –Lottery numbers –Multiple choice exams –Registration

14. Optical Character recognition Hardware captures images Software compares shapes with stored data