system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
What companies are in the Big Four?


assistant
The Big Four is made up of Deloitte, PricewaterhouseCoopers (PwC), Ernst and Young (EY), and KPMG. The Big Four are defined as the largest accounting firms in the world, by revenue. In addition to auditing services, these companies offer tax, strategy, and other consulting services.