In corporate sector the term Big Four refers to the following 4 companies. 1. Deloitte 2. EY 3. PwC 4. KPMG Their services to corporate sector is famous and well-known due to its quality and trust. What services they provide? EY The EY offers taxation services and solutions, consulting services and solutions, AI solutions, strategy and transaction services, technology consulting services and solutions,risk services and solutions, sustainability services and solutions, people and workforce, managed services and solutions. Deloitte The Deloitte offers audit services, insurance services, business process solutions, customer services, cyber services, human capital, strategy and transaction, sustainability,risk, regulatory and forensic services, legal services,operate services,tax services, engineering services,AI solutions, data services, Enterprise technology and database services, generative AI, global employer services, international specialist services. PwC The PwC of...