Level 1
The fewer number of keywords you enter into the search field returns alarger number of matches. This is not a boolean search, so the specificpattern of the words you enter does matter. Searching for LIGHT WAVES willreturn differnt information than WAVES LIGHT.

Level 1 lets you determine if the exact question you have trouble with hasalready been posted. By entering four or more words from one sentence inyour question the search engine will find the identical question.

Level 2
A level 2 search looks in every file in this web site for a match to thetext in the search field. This kind of search can return plenty of junk.

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