the bigger questions

• Bar code readers and RFID readers


  • Both are used in various industries such as retail, manufacturing and healthcare
  • Both rely on electric data capture to read information about each product, whether it's through scanning a barcode or wirelessly reading an RFID tag
• Bar code readers and RFID readers


  • Bar code readers require a clear view and close proximity to the bar-code for scanning, while RFID readers can read tags from a distance without needing a direct line of sight allowing for faster and more efficient scanning
• Digital data is converted to analog data when devices or systems can only understand analog signals or when smooth continuous waves are needed for applications like sound and image reproduction
• Optical Mark Readers (OMRs) and Optical Character Readers (OCRs)


  • Both are used to understand information from physical documents or pictures
  • OMRs focus on detecting and reading marks or checkboxes, like on answer sheets, while OCRs are better at recognizing and converting printed or handwritten text
  • OMRs need specific marks to work well, while OCRs can handle different fonts
  • OMRs are great for exams, while OCRs are more flexible for different types of documents
• What are the (magnetic Strip Reader) advantages and disadvantages?

  Advantages: fast data entry compared to keyboard, error free and can be affected by water. Disadvantage: can be difficult when it's scratched,doesn't work at a distance and can easily be misplaced.
• .What are the advantages and disadvantage?

  Advantages: secure method of paying, less likely to be damaged. Disadvantage: the pin could be read by someone, fraud machines can steal card details
• What is the Advantages and Disadvantage of RFID?

  Advantages: can read from far away, fast read and quick response and can be read in bulk. Disadvantage: expensive than a barcode, the radio symbols can nbe hacked, Tags could interfere each other.