AMAZON COM INC | 2013 | FY | 3

Acquired intangible assets, included within “Other assets” on our consolidated balance sheets, consist of the following (in millions):
 
 
 
 
December 31,
 
 
 
2013
 
2012
  
Weighted
Average Life
Remaining
 
Acquired
Intangibles,
Gross (1)
 
Accumulated
Amortization (1)
 
Acquired
Intangibles,
Net
 
Acquired
Intangibles,
Gross (1)
 
Accumulated
Amortization (1)
 
Acquired
Intangibles,
Net
Marketing-related
6.3
 
$
429

 
$
(156
)
 
$
273

 
$
422

 
$
(113
)
 
$
309

Contract-based
3.0
 
173

 
(110
)
 
63

 
177

 
(89
)
 
88

Technology- and content-based
4.4
 
278

 
(74
)
 
204

 
231

 
(30
)
 
201

Customer-related
2.4
 
368

 
(263
)
 
105

 
332

 
(205
)
 
127

Acquired intangibles (2)
4.2
 
$
1,248

 
$
(603
)
 
$
645

 
$
1,162

 
$
(437
)
 
$
725

 ___________________
(1)
Excludes the original cost and accumulated amortization of fully-amortized intangibles.
(2)
Intangible assets have estimated useful lives of between one and 10 years.

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