Three files are used in the examples throughout this guide. These files can be found in the demo system and are the same files used as examples in the other chapters. The files make up a magazine subscription system. The first file, sub , contains subscriber information. Subscriber is a unique code assigned to each subscriber by the user.
Address is two lines of the subscriber's street address.
The other field contents should be obvious from the field name. The next file, mag , holds information about each magazine. Title is the title of the magazine being sold. Subscribers is the total number of subscriptions to this magazine. The last file, script , contains information about each subscription.