Boolean operator

A Boolean Operator is a conjunction (AND, OR, NOT or AND NOT) used by computer nerds to focus search results and boost their relevance by more effectively specifying the relationships between each search term. X AND Y ("both" X*Y) will only return results containing both variables X OR Y ("either" X+Y) gives results containing either one or both variables X NOT Y ("without" X-Y )can only show results with X that do not have Y