This can apply to the network between the graduates of a single school regardless of their gender. It is also known as an "old boys' society" and is similar to an alumni association. It can also mean a network of social and business connections among the alumni of various prestigious schools. In popular language, "old boy network" or "old boys' society" has come to be used in reference to the preservation of social elites in general; such connections within the British Civil Service formed a primary theme in the British Broadcasting Corporation's satirical comedy series "Yes Minister". The phrase "It's not what you know, it's who you know" is associated with this tradition.