An
address book or a
name and address book (
NAB) is a
book or a
database used for storing entries called
contacts. Each contact entry usually consists of a few standard
fields (for example: first name, last name, company name,
address,
telephone number,
e-mail address,
fax number,
mobile phone number). Most such systems store the details in alphabetical order of people's names, although in
paper-based address books entries can easily end up out of order as the owner inserts details of more individuals or as people move. Many address books use small
ring binders that allow adding, removing and shuffling of pages to make room.