Allowable constructs include and, or, not; parenthesis are allowed. Default is and. The "*" (asterisk) character may be used as a "wildcard" in keywords to match to the beginnings of words.

Example 1: network
Example 2: encrypt* (matches encrypt, encryption, etc.)
Example 3: security computers (same as security and computers)
Example 4: cameras and digital
Example 5: telephone* or radio ("*" to match both singular and plural of telephone)
Example 6: (currency or money) and (financial not credit)