The Bloods, also known as (OBF) Original Blood Family, are a primarily, though not exclusively, African-American street gang founded in Los Angeles, California. The gang is widely known for its rivalry with the Crips.
What to look for. Boolean operators form the basis of mathematical sets and database logic. 1  They connect your seach words together to either narrow or broaden your set of results.2  The three basic boolean operators are: AND, OR, and NOT. For example, Google automatically puts an AND in between your search terms. 2  Though all your search terms are included in the results, they may not be connected together in the way you want. 3  For example, this search: college students test anxiety is translated to: college AND students AND test AND anxiety.
Explicitly, a Boolean algebra is the partial order on subsets defined by inclusion (Skiena 1990, p. 207), i.e., the Boolean algebra of a set is the set of subsets of that can be obtained by means of a finite number of the set operations union (OR), intersection (AND), and complementation (NOT) (Comtet 1974, p. 185).