Match Multiple Limiting Criteria in a Field
The AND operator is most commonly used in the SIC field. Using the AND operator means listings must meet this criterion AND that criterion. You can specify an AND search by using the word ".and."  You may also use the plus key ( + ).  Customers would use this field if they want to find listings that match two (or more) criteria in a given field.

For example: If you are searching in the SIC field for everyone who is both a Dentist AND a Surgeon, you would enter: 

8021 .and. 8011S
Your retrieval field will display all people who are listed as both Dentists AND Surgeons. 

You may also perform the search in the following way: 

8021+8011S

The AND operator is frequently confused with the OR operator.  The AND search should never be used in the state, city, ZIP, or telephone fields; for example, no address occurs in both California AND Nevada at the same time.  To compile a list of all addresses in Califonia and Nevada use an OR search, to find all listings that have either California OR Nevada as their state.