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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The server either does not recognize the request method, or it lacks the ability to fulfil the request. Usually this implies future availability (e.g., a new feature of a web-service API). 502 Bad Gateway The server was acting as a gateway or proxy and received an invalid response from the upstream server. 503 Service Unavailable

  3. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

  4. reCAPTCHA - Wikipedia

    en.wikipedia.org/wiki/I'm_not_a_robot

    reCAPTCHA Inc. [1] is a CAPTCHA system owned by Google. It enables web hosts to distinguish between human and automated access to websites. It enables web hosts to distinguish between human and automated access to websites.

  5. Fix problems signing in to AOL Mail

    help.aol.com/articles/fix-problems-signing-in-to...

    Cookies are little bits of info stored in your browser to allow websites to load quicker. While this usually makes it faster to access sites, this stored info can cause some sites to have loading errors.

  6. List of Google April Fools' Day jokes - Wikipedia

    en.wikipedia.org/wiki/List_of_Google_April_Fools...

    Google TiSP (short for Toilet Internet Service Provider) was a fictitious free broadband service supposedly released by Google. This service would make use of a standard toilet and sewage lines to provide free Internet connectivity at a speed of 8 Mbit/s (2 Mbit/s upload) (or up to 32 Mbit/s with a paid plan). The user would drop a weighted end ...

  7. List of SMTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SMTP_server_return...

    This is a list of Simple Mail Transfer Protocol (SMTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. Unless otherwise stated, all status codes described here is part of the current SMTP standard, RFC 5321. The message phrases shown are typical, but any human-readable alternative ...

  8. List of Google products - Wikipedia

    en.wikipedia.org/wiki/List_of_Google_products

    A webfont hosting service. Google Groups: An online discussion service that also offers Usenet access. Google Meet: A video conferencing platform. Google Voice: A VoIP system that provides a phone number that can be forwarded to actual phone lines. Google Sites: A webpage creation and publication tool. Productivity tools Gmail: An email service ...

  9. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    The request could not be understood due to malformed syntax. [1]: §21.4.1 401 Unauthorized The request requires user authentication. This response is issued by UASs and registrars. [1]: §21.4.2 402 Payment Required Reserved for future use. [1]: §21.4.3 403 Forbidden The server understood the request, but is refusing to fulfill it.