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The other code being used for a wide variety of purposes are QR Codes.
If you aren't 100% clear on what they do, a company, store, restaurant, non-profit, media and many others will set up the QR Code to do one of several things. Then you use a QR CODE reader on your phone or tablet to go to the designated target.
It might do one of the following:
Open a URL
Open an email in YOUR email program with an address already added
Open a PDF, such as a menu at a restaurant
Becomes your ticket to enter at an event
Is your Boarding Pass to get on a flight or other transportation
2 Tips for QR CODE READERS:
1) Have the QR code reader app on your main phone screen for easy access
2) Be aware that for some QR CODE READERS the screen that opens will likely have an advertisement so make sure you select the URL for what your are accessing!
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