Equity benchmark indices, the Nifty and the Sensex, climbed in early trade on Tuesday amid buying in IT majors, mainly Tata Consultancy Services and Infosys along with fresh foreign fund inflows. Among the Sensex firms, Tata Consultancy Services, Bharti Airtel, HCL Technologies, Wipro, Maruti, Infosys, Tech Mahindra, Tata Motors, Hindustan Unilever and Mahindra & Mahindra were the major gainers.