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  2. List of commercial failures in video games - Wikipedia

    en.wikipedia.org/wiki/List_of_commercial...

    As a hit-driven business, the great majority of the video game industry's software releases have been commercial disappointments.In the early 21st century, industry commentators made these general estimates: 10% of published games generated 90% of revenue; [1] that around 3% of PC games and 15% of console games have global sales of more than 100,000 units per year, with even this level ...

  3. List of FTP server return codes - Wikipedia

    en.wikipedia.org/.../List_of_FTP_server_return_codes

    FTP server return codes always have three digits, and each digit has a special meaning. [1] The first digit denotes whether the response is good, bad or incomplete: Range

  4. 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 ...

  5. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  6. Nuclear football - Wikipedia

    en.wikipedia.org/wiki/Nuclear_football

    President Reagan and Nancy Reagan in 1987—the military aide at right-center is carrying the nuclear football. The nuclear football, officially the Presidential Emergency Satchel, is a briefcase, the contents of which are to be used by the president of the United States to communicate and authorize a nuclear attack while away from fixed command centers, such as the White House Situation Room ...

  7. Two-person rule - Wikipedia

    en.wikipedia.org/wiki/Two-person_rule

    Per US Air Force Instruction (AFI) 91-104, "the two-person concept" is designed to prevent accidental or malicious launch of nuclear weapons by a single individual. [1]In the case of Minuteman missile launch crews, once a launch order is received, both operators must agree that it is valid by comparing the authorization code in the order against a Sealed Authenticator (a special sealed ...