Unfortunately I'm not sure that they are all the thing, though I'm probably wrong on that. Sea Urchin many thanks for your response - it is much appreciated
When I look in my Windows Address Book it is empty. In Outlook my Contacts Folder is a sub-folder of the Outlook Address Book, and it contains my "address book" - ie the one I have created.
When I set up the address of a new email and click in the "To..." field and type the first letter or two, I am offered a selection of possible recipients, some of which may be in my Contacts folder, but often they are not! Where do they come from?!
AutoComplete is a feature which displays suggestions for names and e-mail addresses as you begin to type them. These suggestions are possible matches from a list of names and e-mail addresses that you have typed before, known as the AutoComplete name list.
I may have this wrong but here goes! In XP the Windows Address Book is the list of addresses used by Outlook Express and has a file extension of wab. Outlook cannot use a wab file but can import from it. The Outlook address book is often the same as the contacts list and is a pst file. To confuse things you can also have Personal Address Book which is a pab file.