PricewaterhouseCoopers, also known as PwC, specializes in tax and advisory services. With annual revenues of more than $28 billion, the company has been in operation since 1998. It serves clients in the aerospace, defense, automotive, energy, entertainment, insurance, chemical, financial service, communications and logistics industries. PricewaterhouseCoopers offers financial accounting, internal auditing and human resources management services. It also provides assistance with cases related to acquisitions and mergers. The company offers business recovery and consultation and modeling and business planning services. PricewaterhouseCoopers employs a staff of over 155,000 people in nearly 145 countries. The company s clients include TNK-BP and Petrobras S.A. It is a member of PricewaterhouseCoopers International Limited.