We amortize finite-lived intangible assets over their estimated useful lives as follows.

	Basis of amortization	Amortization period (in years)
Customer relationships	Straight-line and accelerated(1)	8-17
Marketing assets	Straight-line	3-9
Acquired software and technology	Straight-line and accelerated(2)	5-10
Non-compete agreements	Straight-line	3-5
Database	Straight-line	8

(1)	Certain of the customer relationships are amortized on an accelerated basis.

(2)	Certain of the acquired software and technology assets are amortized on an accelerated basis.