A Zone is a list of Household Customers to which a carrier delivers. Zones don't necessarily lie within a districts boundary. By far the most common operation with Zones is the additon and deletion of customers. After working through this part of the manual you should be able to fully utilize Mammoth's ability to shuffle customers from and to Zones. You should also have no troubles creating, deleting, and keeping a Zone's list of customers current.
Note: During the tutorial the use is to enter all data that is in italicized bold face