In the good old days, Microsoft would have called it "Microsoft Address Book", waited a few years, then started suing people for using the term "Address Book". More recently, they'd have called it "My Address Book" and then changed it back to "Address Book" in Vista, breaking applications that expected to find "My Address Book". And the 32-bit version would be in "Program Files x86" because it's really important to segregate applications by their bitness.
"Press the File menu," I expect it to say, "and a beautiful pull-down fades quickly into view, with useful functions such as New Folder and Close."
Too bad Apple patented calling an address book "Address Book," I guess they'll just have to do their best with nonsense names.