A search operator is an instruction that joins keywords to form a new, more complex query. It enables you to look for several words at once by telling Copernic Desktop Search how to link keywords. The most common search operators are the three Boolean operators (AND/+, OR and NOT/-), which allow the inclusion or exclusion of documents from the search results.
This page not only has a link to the wiki presentation, also has links to similar presentations for Voicethread, Wordle, Pocket Video, Google Docs, Interactive Whiteboard, search engines and Twitter!