This document provides an overview of green computing. It discusses what green computing is, why it is important, and some of the key approaches like virtualization, power management, and material recycling. It also outlines steps organizations can take like establishing green purchasing policies and recycling programs. The document notes that IT vendors like Apple, Google, and Wipro are playing a role in green computing. It concludes that achieving fully green computers will be an ongoing process of incremental improvements over many years.