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2. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_Code

   Accessible QR is a type of QR code that combines a standard QR code with a dot-dash pattern positioned around one corner of the code to provide product information for people who are blind and partially sighted. The codes, announce product categories and product details such as instructions, ingredients, safety warnings, and recycling information.

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

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

   1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more. Add or disable 2-step verification for extra security. 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 ...

4. Peer instruction - Wikipedia

   en.wikipedia.org/wiki/Peer_instruction

   Peer instruction is an evidence-based, interactive teaching method popularized by Harvard Professor Eric Mazur in the early 1990s. [ 1 ] [ 2 ] Originally used in many schools, including introductory undergraduate physics classes at Harvard University , peer instruction is used in various disciplines and institutions around the globe.

5. EPC QR code - Wikipedia

   en.wikipedia.org/wiki/EPC_QR_code

   EPC QR code. The European Payments Council Quick Response Code guidelines define the content of a QR code that can be used to initiate SEPA credit transfer (SCT). It contains all the necessary information in clear text. These QR code guidelines are used on many invoices and payment requests in the countries that support it (Austria, Belgium ...

6. Why Did Katy Perry Wear a QR Code on the VMAs Red Carpet? - AOL

   www.aol.com/why-did-katy-perry-wear-001700031.html

   The QR code links to a pre-save website for Perry’s upcoming studio album, 143, out September 20. (If your phone isn’t picking up on the QR code either, you can find the link it brings up here.)

7. Halt and Catch Fire (computing) - Wikipedia

   en.wikipedia.org/wiki/Halt_and_Catch_Fire...

   Halt and Catch Fire (computing) In computer engineering, Halt and Catch Fire, known by the assembly language mnemonic HCF, is an idiom referring to a computer machine code instruction that causes the computer's central processing unit (CPU) to cease meaningful operation, typically requiring a restart of the computer.