India is the largest sourcing destination for the IT sector, contributing significantly to its GDP and global exports. Major players include TCS, Cognizant, Infosys, Wipro, and Hewlett-Packard, with IT services and business process management being key market segments. The future outlook predicts the sector will reach $225 billion by 2020 and $350 billion by 2025, supported by government initiatives like the Digital India program.