Org

A Salesforce org is a secure web application designed to be used by a business or organization as customer relationship management (CRM) platform for sales, customer support, and business intelligence. Each instance has a unique Org ID. Several org editions are available to provide additional capabilities to larger companies (Developer, Group, Professional, Enterprise, Unlimited, Performance). As orgs are intended to be customized, "sandbox" orgs are copies of a production org to be used for development and testing. For more, see An Introduction to Environments (Salesforce Technical Library).