1.   Although callers will have to dial three extra digits, calls to and from the two new area codes will not be toll calls.

2.   Because customers must dial extra digits if they use a long-distance carrier for such calls, Ameritech has been able to keep toll calls almost exclusively to itself.

3.   First the bureau mailed out the census forms with an extra digit in each address.

4.   Fixing phone number databases at companies around the country to accommodate extra digits could cost, in aggregate, tens or hundreds of millions of dollars.

5.   Mutations in homeobox genes, which turn other genes on and off, seem to give rise to extra digits.

6.   The files in which information is stored would have to be made fatter to leave room for the extra digits.

7.   An extra digit was printed at the beginning of each street address.

8.   An extra digit was printed at the beginning of each street address, the Post said in its editions Saturday.

9.   London -- Extra digit added to all British telephone codes.

10.   Two weeks ago, census officials said a printing error caused an extra digit to be printed before street addresses on the same mailings.