AUTOMATIC DATA PROCESSING INC — Director's Dealing 2007

May 4, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AUTOMATIC DATA PROCESSING INC (ADP)
CIK: 0000008670
Period of Report: 2007-03-30

Reporting Person: WEINBACH ARTHUR F (Chairman)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2007-05-03	Common Stock	M	219500	$21.21	Acquired	771970.98	Direct
2007-05-03	Common Stock	S	214500	$46.48	Disposed	557470.98	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-03-30	Stock Option (Right to Buy)	$	J	103069	Acquired	1988-08-08	Common Stock (103069.00)	Direct
2007-03-30	Stock Option (Right to Buy)	$37.81	J	8775	Acquired	2013-08-10	Common Stock (8775.00)	Direct
2007-03-30	Stock Option (Right to Buy)	$37.81	J	24375	Acquired	2013-08-10	Common Stock (24375.00)	Direct
2007-03-30	Stock Option (Right to Buy)	$39.03	J	16575	Acquired	2014-08-10	Common Stock (16575.00)	Direct
2007-03-30	Stock Option (Right to Buy)	$44.46	J	16575	Acquired	2015-08-10	Common Stock (16575.00)	Direct
2007-05-03	Stock Option (Right to Buy)	$	M	219500	Disposed	1988-08-08	Common Stock (219500.00)	Direct

Footnotes

F1: The per-share exercise price of each option was adjusted by multipling the original exercise price by the inverse of the Adjustment Fraction (i.e., 0.9112), as calculated pursuant to ADP's March 30, 2007 tax-free spin-off of Broadridge Financial Solutions, Inc. to its stockholders.

F2: Exerciseable price varies

F3: The number of options were adjusted by the Adjustment Fraction (i.e, 1.0975), as calculated pursuant to ADP's March 30, 2007 tax-free spin-off of Broadridge Financial Solutions, Inc. to its stockholders.

F4: Will vest equally over 5 years

F5: Vests equally over 5 years beginning in 2007