Direct Data Entry and Associated Devices

Direct Data Entry and Associated Devices

Direct Data Entry (DDE)

  • Direct Data Entry (DDE) is a way of entering data directly into a computer system with no manual processing.
  • Unlike manual entry methods, DDE minimises human error and increases the speed of data entry.
  • DDE devices use automatic or semi-automatic techniques to read and input data.

Magnetic stripe reader

  • A magnetic stripe reader is a type of DDE device that reads information stored on the magnetic stripe of a card, such as a credit card.
  • This information can be personal data, bank details, or other data depending on the card type.
  • Magnetic stripe readers are used in diverse fields such as finance, transportation, and access security systems.

Chip and Pin device

  • A Chip and Pin device is a DDE device used to read information stored in the chip on a bank card.
  • When a card with a chip is inserted into the device, the data is directly inputted into a computer system.
  • This technology is commonly used for financial transactions in supermarkets, restaurants, and various other establishments.

Barcode reader

  • A barcode reader is another common DDE device.
  • It uses a laser beam to read the unique pattern of bars on a product. This code is then translated into a line of text that can be understood by a computer.
  • They are often used at retail store cash registers to input the price of an item directly into the computer system, speeding up the checkout process.

Optical Mark Reader (OMR)

  • An Optical Mark Reader (OMR) is a DDE device that reads pencil or pen marks on a special pre-printed form.
  • OMR is commonly used for multiple-choice test papers where candidates mark their answers in specific areas on the answer sheets.
  • These sheets are then passed through an OMR machine where the filled-in areas are converted into digital data.

Radio Frequency Identification (RFID) reader

  • A Radio Frequency Identification (RFID) reader is a type of DDE device used in stock control systems.
  • RFID tags attached to objects transmit unique identifying signals, which the reader picks up.
  • The RFID tags can be scanned without direct contact, making them effective in supply chain management, toll collection and ticketing systems.

Remember, these DDE devices directly input data into a computer system, minimising human intervention. Devices like barcode readers, magnetic stripe readers, and RFID readers allow data to be entered at its source, significantly reducing the chances of errors and speeding up the process.