# Setup

- [Lead Source](/activebooks/crm/setup/lead-source.md): A Lead Source is a source from which the leads are generated.
- [Opportunity Type](/activebooks/crm/setup/opportunity-type.md): Opportunity Type indicates the broad category of opportunity like Sales, Support, Maintenance, Partnership etc.
- [Sales Stage](/activebooks/crm/setup/sales-stage.md): A Sales Stage indicates the level at which an opportunity is in the sales cycle.
- [Sales Person](/activebooks/crm/setup/sales-person.md): Sales Person is a person who sells your products/services.
- [Customer Group](/activebooks/crm/setup/customer-group.md): Customer Group is an aggregation of customers that are similar in some way.
- [Email Group](/activebooks/crm/setup/email-group.md): An Email Group is a list of subscriber email IDs to which you send newsletters.
- [Contract](/activebooks/crm/setup/contract.md): A contract is a legally binding agreement between a Supplier and a Customer over the sale or products or services.
- [Appointment Booking Settings](/activebooks/crm/setup/appointment-booking-settings.md)
