Microsoft is an American multinational technology company headquartered in Redmond, Washington, that develops, manufactures, licenses, supports and sells computer software, consumer electronics and personal computers and services.

PricewaterhouseCoopers (trading as PwC) is a multinational professional services network. It is the largest professional services firm in the world, and is one of the Big Four auditors. Vault Accounting 50 has ranked PwC as the most prestigious accounting firm in the world for seven consecutive years, as well as the top firm to work for in North America for three consecutive years.

Ernst & Young Global Limited is a multinational professional services partnership headquartered in London, England. EY is one of the largest professional services networks in the world.

Diebold, Inc. is a United States-based financial self-service, security and services corporation that is engaged primarily in the sale, manufacture, installation and service of self-service transaction systems (such as ATMs), electronic and physical security products (including vaults and currency processing systems), and software and integrated systems for global financial and commercial markets. Diebold is the largest U.S. manufacturer of ATMs.

Bharti Airtel Limited is an Indian multinational telecommunications Services Company headquartered in New Delhi, India. It operates in 20 countries across South Asia, Africa, and the Channel Islands. Airtel provides GSM, 3G and 4G LTE mobile services, fixed line broadband and voice services. Airtel is the largest mobile operator in South Asia and the third largest in the world with a 303 million subscriber base.