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2. QR code | Wikipedia

   en.wikipedia.org/wiki/QR_Code

   Whereas a barcode is a machine-readable optical image that contains information specific to the labeled item, the QR code contains the data for a locator, an identifier, and web-tracking. To store data efficiently, QR codes use four standardized modes of encoding: (I) numeric, (ii) alphanumeric, (iii) byte or binary, and (iv) kanji. [4] Compared to standard UPC barcodes, the QR labeling system ...

3. Add or disable 2-step verification for extra security | AOL Help

   help.aol.com/articles/2-step-verification...

   Add an extra security step to sign into your account with 2-step verification. Find out how to turn on 2-step verification and receive a verification code, and how to turn off 2-step verification if you need to.

4. Barcode | Wikipedia

   en.wikipedia.org/wiki/Barcode

   Defunct as of 2019, replaced by standard QR codes. Micro QR code: Micro QR code is a smaller version of the QR code standard for applications where symbol size is limited. Micro PDF417: MicroPDF417 is a restricted size barcode, similar to PDF417, which is used to add additional data to linear barcodes. MMCC

5. Barcode reader | Wikipedia

   en.wikipedia.org/wiki/Barcode_reader

   Barcode reader. A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. [1] Like a flatbed scanner, it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals. Additionally, nearly all barcode readers contain ...

6. Fix problems signing into your AOL account | AOL Help

   help.aol.com/articles/help-signing-in

   Having trouble signing in? Find out how to identify and correct common sign-in issues like problems with your username and password, account locks, looping logins, and other account access errors.

7. Petit Computer | Wikipedia

   en.wikipedia.org/wiki/Petit_Computer

   The usage of QR codes enabled some users to develop desktop software that can be used to write SmileBASIC and generate a QR code for easy transfer to the DS. [5] Petit Computer comes with several simple sample applications, 5 sample games, and several graphics-editing applications, all written in SmileBASIC with viewable source code. [6]