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Net Sales by Product Group and End Market
 3 Months Ended
Mar. 31, 2021
Revenue from Contract with Customer [Abstract]  
Net Sales by Product Group and End Market Net Sales by Product Group and End Market
The following table presents our net sales by product group. Beginning in 2021, we are reporting memory net sales in Advanced products. Previously, memory net sales were reported in Mainstream products. Prior year amounts were reclassified to conform to current year presentation.
For the Three Months Ended March 31,
20212020
(In thousands)
Advanced products (1)$920,655 $794,777 
Mainstream products (2)405,495 357,839 
Total net sales$1,326,150 $1,152,616 
(1) Advanced products include flip chip, memory and wafer-level processing and related test services.
(2) Mainstream products include all other wirebond packaging and related test services.
Net sales by end market consist of the following:
For the Three Months Ended March 31,
20212020
Communications (handheld devices, smartphones, tablets)40 %38 %
Consumer (connected home, set-top boxes, televisions, visual imaging, wearables)
21 %24 %
Automotive, industrial and other (driver assist, infotainment, performance, safety)
22 %23 %
Computing (data center, infrastructure, PC/laptop, storage)
17 %15 %
Total net sales100 %100 %