Which of the following is NOT a pillar(s) on which Computerized Accounting System rests?

Office

The Computerized Accounting System (CAS) has the following components:
Procedure : A logical sequence of actions to perform a task.
Data : The raw fact (as input) for any business application.

People : Users.
Hardware : Computer, associated peripherals, and their network.
Software : System software and Application software.

These are the five pillars on which Computerized Accounting System rests.