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2. MeCard (QR code) - Wikipedia

   en.wikipedia.org/wiki/MeCard_(QR_code)

   MeCard is a data file similar to vCard but used by NTT DoCoMo in Japan in QR code format for use with Cellular Phones. It is largely compatible with most QR-readers for smartphones. It is an easy way to share a contact with the most used fields. Usually, devices can recognize it and treat it like a contact ready to import.

3. Wi-Fi Protected Access - Wikipedia

   en.wikipedia.org/wiki/Wi-Fi_Protected_Access

   Wi-Fi Protected Access. Wi-Fi Protected Access ( WPA ), Wi-Fi Protected Access 2 ( WPA2 ), and Wi-Fi Protected Access 3 ( WPA3) are the three security certification programs developed after 2000 by the Wi-Fi Alliance to secure wireless computer networks. The Alliance defined these in response to serious weaknesses researchers had found in the ...

4. Barker code - Wikipedia

   en.wikipedia.org/wiki/Barker_code

   A Barker code or Barker sequence is a finite sequence of N values of +1 and −1, with the ideal autocorrelation property, such that the off-peak (non-cyclic) autocorrelation coefficients. are as small as possible: for all . [1] Only nine Barker sequences [6] are known, all of length N at most 13. [7] Barker 's 1953 paper asked for sequences ...

5. Private WiFi | 30-Day Free* Trial | AOL Products

   www.aol.com/products/security/private-wifi

   Help protect your online privacy with Private WiFi. Encrypts and anonymizes internet browsing on up to 3 devices. Try it free* now!

6. Low-density parity-check code - Wikipedia

   en.wikipedia.org/wiki/Low-density_parity-check_code

   LDPC codes functionally are defined by a sparse parity-check matrix. This sparse matrix is often randomly generated, subject to the sparsity constraints—LDPC code construction is discussed later. These codes were first designed by Robert Gallager in 1960. Below is a graph fragment of an example LDPC code using Forney's factor graph notation.

7. How to Get Free WiFi Anywhere, Anytime -- Savings Experiment

   www.aol.com/2014/07/22/free-wifi-anywhere...

   There are several ways you can find free WiFi wherever you are. If you want a quick and easy way to scan your area to find the closest hotspots, check out a free app called WeFi. WeFi lists over 200