This document summarizes how services differ from goods and how they can be classified. It outlines six ways that services can be classified, such as by equipment versus people-based delivery or for-profit versus non-profit objectives. The key differences between services and physical goods are discussed as well, noting that services are intangible, inseparable, can vary in quality, and are perishable if not provided at the right place and time. The document was prepared by Kartik Singla as part of an internship.