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  2. List of SMTP server return codes - Wikipedia

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

    X.3.XXX Mail System Status. X.4.XXX Network and Routing Status. X.5.XXX Mail Delivery Protocol Status. X.6.XXX Message Content or Media Status. X.7.XXX Security or Policy Status. The meaning of the "detail" field depends on the class and the subject, and are listed in RFC 3463 and RFC 5248 . A server capable of replying with an Enhanced Status ...

  3. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.

  4. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This is a list of Hypertext Transfer Protocol (HTTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP. The first digit of the status ...

  5. iPhones will soon be repairable with genuine used components ...

    www.engadget.com/iphones-will-soon-be-repairable...

    Starting this fall, those who access the Parts and Service History section of their iPhone settings will be able to see if a replacement part is new or a genuine used one from another iPhone.

  6. How to set up a complex passcode on your iOS device - Engadget

    www.engadget.com/2014-03-05-how-to-set-up-a...

    To set a passcode that can include numbers, letters, and special characters, go to Settings > General > Passcode Lock. If you've grown weary of Touch ID and would like to do this on an iPhone 5s ...

  7. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    The American mathematician Richard Hamming pioneered this field in the 1940s and invented the first error-correcting code in 1950: the Hamming (7,4) code. [5] FEC can be applied in situations where re-transmissions are costly or impossible, such as one-way communication links or when transmitting to multiple receivers in multicast.

  8. iPhone 101: What those icons mean when you are ... - Engadget

    www.engadget.com/2014-06-23-iphone-101-icons...

    Here is a list of common app icon status messages and what each one means. Waiting: This icon appears when an app is in a queue to be download. This blank icon is often seen when you have ...

  9. Category:Hypertext Transfer Protocol status codes - Wikipedia

    en.wikipedia.org/wiki/Category:Hypertext...

    It should only contain pages that are Hypertext Transfer Protocol status codes or lists of Hypertext Transfer Protocol status codes, as well as subcategories containing those things (themselves set categories). Topics about Hypertext Transfer Protocol status codes in general should be placed in relevant topic categories