Section 5 Web Myths > URLs > Search Engines > Special Directories > Exercise > Precision Searching Strategies > Exercise

Boolean Operator AND

Boolean operators allow users to join two or more search terms, thereby producing a more precise search which results in a better set of resullts. When you join two or more terms with AND, you are saying that every document you retrieve must contain all of your search terms. The boolean AND allows you to make your search more specific.

The following search is limited to a specific aspect of Roosevelt's career.

Franklin Delano Roosevelt AND Civilian Conservation Corps

Colleges AND rankings

In some search engines, such as Google, and is the default, so there is no need to insert it between search terms.

Boolean or

When you insert OR (in capital letters) between search terms, you ask that either or both terms appear in the documents you retrieve. This strategy can be used to broaden a search by including variant spellings for a search term or alternate ways of saying the same thing.

Including variant spellings of a word
marijuana OR marihuana

Including alternate ways of saying the same thing.
GOP OR Republican Party
slavery OR bondage

Keep concepts that are alike together and separate from the rest of your search string by enclosing them in parentheses. This is called nesting. Some, but not all, search engines support nesting. See below for examples.

(slavery OR bondage) AND Underground Railroad

(AIDS OR Auto Immune Deficiency Syndrome) AND treatment

(Nafta OR North Atlantic Treaty Organization) AND (Mexico OR Canada)

Note: Boolean Operators should be capitalized

Boolean NOT/Truncation . Phrase Searching/Capitalizatization . Field Searching . Domain Restriction . Advanced Searching . Refining a Search . Boolean AND and OR

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