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  2. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  3. Wikipedia:WikiProject Check Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:WikiProject...

    Wikipedia:HTML 5 – information page on technical details of updating WP code to HTML 5 + CSS3, including how to replace deprecated HTML 4.01 markup; includes automated searches for obsolete markup Wikipedia:Linter – MediaWiki extension to identify broken and problematic markup which cannot be fixed automatically by the server

  4. List of ISO 3166 country codes - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_3166_country_codes

    ISO 3166-1 alpha-2 – two-letter country codes which are also used to create the ISO 3166-2 country subdivision codes and the Internet country code top-level domains. ISO 3166-1 alpha-3 – three-letter country codes which may allow a better visual association between the codes and the country names than the 3166-1 alpha-2 codes.

  5. Help:Reset password - Wikipedia

    en.wikipedia.org/wiki/Help:Reset_password

    If you have forgotten your password and you previously entered an email address when signing up for the account or in your Preferences, and you still have access to that email account, then this special page can help you recover access to your account. Go to Special:PasswordReset. You can enter either your username or your email.

  6. Rainbow table - Wikipedia

    en.wikipedia.org/wiki/Rainbow_table

    In the simple case where the reduction function and the hash function have no collision, given a complete rainbow table (one that makes sure to find the corresponding password given any hash) the size of the password set |P|, the time T that had been needed to compute the table, the length of the table L and the average time t needed to find a ...

  7. Help:Two-factor authentication - Wikipedia

    en.wikipedia.org/wiki/Help:Two-factor_authentication

    If you are not in one of these groups, you need to submit a request at m:Steward requests/Global permissions#Requests for 2 Factor Auth tester permissions to obtain access to 2FA (see request examples), explicitly mentioning that you have read Help:Two-factor authentication on Meta (which is not the page you're reading now).

  8. Help:User contributions - Wikipedia

    en.wikipedia.org/wiki/Help:User_contributions

    Your own contributions page. To access your own user contributions page, click the drop down labelled with a person icon at the top right corner of the page. Then click Contributions. An alternative is to type in the Search box: Special:MyContributions. Another registered user's contributions page.

  9. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.