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the HTTP status code to redirect web applications to a new location (URL).
401 Unauthorized - Very similar to 403 forbidden but is used when authentication is required and has failed or not been provided.
a HTTP status code that tells the user/application that they do not have permission to access the requested document/webpage.
a HTTP standard response code indicating that the client was able to communicate with the server, but the server could not find what was requested.
a standard HTTP status code indicating that a requested resource is no longer available at the server and no forwarding address is known.
A way to test which version of a website performs better by showing one version to 50% of its visitors and another version to the remaining 50%.
Accessibility: the practice of making sites which function smoothly for users with a variety of disabilities, including blindness, deafness, and paralysis among others.
A social bookmarking service that can be integrated into a website with the use of a web widget.