Stock Split Information

SPLIT
SPLIT SHARE
NUMBER
DISTRIBUTION DATE
RECORD DATE
SPLIT
9
01/01/99
12/11/98
2 for 1
8
01/01/96
12/15/95
2 for 1
7
05/01/91
04/15/91
2 for 1
6
06/06/86
05/12/86
2 for 1
5
05/21/81
05/11/81
2 for 1
4
06/15/76*
06/15/76*
2 for 1
3
11/20/69*
11/20/69*
3 for 1
2
11/28/66*
11/28/66*
2 for 1
1
02/25/66
02/04/66
3 for 2
1
*  These stock splits were approved by ADP's stockholders who simultaneously approved necessary
   enabling amendments to ADP's certificate of incorporation.  Each record date is the date that the
   applicable amended certificate of incorporation was filed with the Secretary of State of Delaware.