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Introduction to Boolean Logic (continued)


  • Used to retrieve a set in which each citation contains at least one of the search terms.
  • Use OR when you want to pull together articles on similar topics.
diagram of search terms football or hockey or soccer

Example: football OR hockey OR soccer

Each circle in the diagram to the right represents the retrieval for each term. The grey areas represent the retrieval for this example – all records that include any one of these terms.

The table below represents sample results for each term, then for the terms combined with OR.

Search terms Results
football 4819
hockey 1058
soccer 2517
football OR hockey OR soccer 6090
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