CSS Practice Material: The Central Superior Services (denoted as CSS; or Bureaucracy) is an elite permanent bureaucratic authority, and the civil service that is responsible for running the civilian bureaucratic operations and government secretariats and directorates of the Cabinet secretariat.The civil service defined itself as “key wheels on which the entire engine of the state has to move.”Derived from the colonial legacy of the former Indian Civil Service, the civil came into its modern formation immediately after the establishment of Pakistan as a “Civil Service of Pakistan. CSS Practice Material