Commercial Data Processing

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COmmercial Data Processing

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Commercial Data Processing

  1. 1. Commercial Data Processing Standard Grade
  2. 2. Data Input <ul><li>There are several methods for passing data into a computer. The following is a list of those that can be used by businesses such as shops and banks: </li></ul>
  3. 3. Bar Codes <ul><li>This is a series of black and white vertical lines that can be read using a laser or a light wand. </li></ul><ul><li>Barcodes can be read quickly and accurately by the computer but cannot be read by a human as the data is binary. </li></ul><ul><li>A Bar code contains information about the manufacturer, county of origin, item code and check digit. </li></ul>
  4. 4. Mark Sense Cards <ul><li>The user marks a specially prepared document with a pencil or ink. </li></ul><ul><li>A machine called a reader is able to read the marks left on the paper using special photo-cells. This is useful for making multiple choice exams papers, football or lottery coupons. </li></ul>
  5. 5. Magnetic Stripes <ul><li>These are strips of magnetic tape which are normally used on the bank of credit cards. A magnetic reader is used to get the data from the card. </li></ul><ul><li>Magnetic stripes have all the advantages of barcodes but can be damaged easily by magnets. They are sometimes used as pass cards to secure areas of building. </li></ul>
  6. 6. Magnetic Ink Character Recognition (MICR) <ul><li>This uses a special magnetic ink which can be read by the computer. </li></ul><ul><li>It requires the document with MICR to be printed using a special printer. </li></ul><ul><li>The reader can read the information on a document even if it is dirty or creased. They are normally printed onto bank cheques. </li></ul>
  7. 7. Optical Character Recognition (OCR) <ul><li>OCR is used for reading characters from paper, using scanners, and inputting them into a computer . The shapes of different characters are detected by shining light on them, and sensing the patterns of reflected light. Each pattern is compared with a set of stored patterns until the closet match is found. </li></ul>
  8. 8. Scanners <ul><li>Were originally designed to scan pictures but they can now be used to scan text into a word processor. </li></ul><ul><li>OCR can save a lot of typing if you need to enter a printed document onto a word processor! </li></ul>
  9. 9. Smart Cards <ul><li>Smart cards have microchip and on-board memory instead of magnetic stripe to hold information. </li></ul><ul><li>The microchip </li></ul>

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