India, Oct. 22 -- Big IT is going small: Tata Consultancy Services Ltd (TCS) and Wipro Ltd are turning to mid-sized clients as artificial intelligence (AI) erodes demand from their Fortune 500 customers, setting the stage for a margin-sapping price war with mid-tier rivals that have long focused on clients with annual revenue of less than $5 billion. TCS, India's largest information technology (IT) services provider, is looking to sell its offerings to governments, while Wipro, the country's fourth-largest IT services firm, is targeting smaller companies undertaking broader AI-led technology transformations to grow its business. With this, TCS and Wipro join Accenture Plc, Cognizant Technology Solutions Corp. and HCL Technologies Ltd in sha...