Wikipedia:Tip of the day/June 19, 2007
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Sometimes, it might be useful to look up a page in the same way you would look it up in a paper Encyclopedia - by looking for its name in the index. To do this, just click on Index of articles, type the beginning of the article's name into the Display pages with prefix box and press Go. You will now see a list of all pages which begin with what you typed. You can reduce the number of articles displayed in this list by typing more of the name and pressing Go again. You can also find Wikipedia users in a similar way by changing the entry in the drop-down box labelled Namespace, from Main to User.
Read more: Wikipedia: Special pages