List Files
∫Memory Resident List File
•	The Address Book list file is memory resident, as opposed to reading each record as required from the disk. This makes searching for records or for text within records very fast. 
•	The “Goto” function, that is, finding a record by pressing Command-G and typing the name as it appears in the index, is instantaneous.
∫Data Base Size
•	Memory is allocated for the selected list file and an additional 100 records each time the program is run. 
•	Should you wish to add more than 100 new records in one session, you will have to Quit and reopen the DA to create space for another 100 records.
•	Address Book has a limit of 32000 but this would require over 20 meg of RAM.
∫Selecting The List File
•	When the Address Book DA is opened, it looks for the list file via the stored path.  You can set the path by opening a list file and pressing the “Default List” button in the Preferences dialog.
•	If you hold down the Command key as you open the application, the “Open file” dialog appears, and you can choose which list file to load.
∫Save Copy To
•	If records have been marked, you will be asked if you want to make a copy containing only the marked records or the unmarked records. This is useful if you wish to split a list, or give selected records to friends or co-workers who can then merge them into their existing lists using the Merge function.
∫Save to Backup
•	Makes a safety copy of the list file, just in case the original is trashed.