This document provides a summary of different business models used in the IT industry. It begins with introducing business models and describing the key components of a business model. It then provides context on the IT and ITES industries in India. The main body summarizes various business models for IT product development companies, including licensing, subscription, and royalty models. It also summarizes business models for IT services companies, such as time and material, fixed cost, offshore development center, and software as a service models.