An architectural Style defines as a family of such systems in terms of a ( )of structural organization. More specifically an architectural style defines a vocabulary of( ) and connector types, and a set of(请作答此空)on how they can be combined. For many styles there may also exist one or more ( ) that specify how to determine a system's overall properties from the properties of its parts. Many of architectural styles have been developed over the years. The best-known examples of ( )architectures are programs written in the Unix shell．