HTTP 501 - Wikipedia

Redirect to:

This page is a redirect. The following categories are used to track and monitor this redirect:

From a code: This is a redirect from a code that has no distinctive category to which it may be sorted. Examples are DOCTYPE, and redirects from HTML and hexadecimal codes.

To an embedded anchor: This is a redirect from a topic that does not have its own page to an embedded anchor on the redirect's target page.
- An {{anchor|(anchor name)}} or {{visible anchor}} template, a HTML element with id="(anchor name)", or an |id=(anchor name) parameter might be installed at the beginning of a paragraph, in or near a section header or within a table. The anchor might also be an old section header that has been edited and is anchored within or near the new header to prevent broken internal and external links.
- Even though section headers of the general form ==(Header name)== are themselves a type of anchor, use {{R to section}} instead.

From a printworthy page title: This is a redirect from a title that would be helpful in a printed or CD/DVD version of Wikipedia. See Wikipedia:Printability and Version 1.0 Editorial Team for more information.

When appropriate, protection levels are automatically sensed, described and categorized.