Connectors

Connectors (Boolean operators) are used in keyword searches to link together two or more terms. The most commonly-used connectors are: AND and OR.

AND narrows a search; you get fewer records, because both concepts must be present in the records found--here the area in color. Use AND to combine different concepts in one search.

AND will lead you to fewer results because All of the terms in your search MUST appear.

OR broadens a search; you get more records because OR includes each of the concepts separately, as well as both concepts when found together. OR is often used to link together related concepts.

OR will lead you to more results because only ONE of your search terms needs to appear.