All categories of questions generated in human mind is covered.
There are more than 8,600 categories and subcategories - and rising every day.
There are 22 Main Categories on WikiAnswers.
We don't add categories every day. We usually add them once a week... but if you averaged out the amount per day, it might be about 1 or 2, depending on the week.
On average, about two to three categories are requested every day on WikiAnswers. Categories are usually reviewed weekly by Community Assistants. See related questions for more information on requesting categories.
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No, there is only one WikiAnswers site however there are many categories for the Harry Potter series on the WikiAnswers site. There is however, a Harry Potter a wikia.
The protective clothing mainly divided in two category :general labor protective clothing and special labor protective clothing. Each of these categories has several subcategories, which are too numerous to list here.
A subcategory is usually formed when there are a significant number of questions under a particular subcategory of a category. In your case, if there are atleast a 50 or so questions under any of the sub categories in philosophy you can ask the supervisor of the category for a new subcategory.
One can find information about a career path in Kraft on the official website Career Kraft and Kraft careers. There are many categories and subcategories.
People ask questions on all kinds of things here on WikiAnswers! If you click on 'Browse Categories' under 'Site Tools' on the blue left toolbar, you can search for and browse through the many question categories on this site.
You get 2 contribution points for asking and categorizing a question.
There are many, many categories that can be used, including many "catch-all" categories for questions that for various reasons should be removed. Go to any question that you have asked and click on [Edit categories]. You can explore the list. If you click on the triangles to the left of some entries you will see a pull-down of more categories.