Segment Information Our Chief Executive Officer, who is considered to be our chief operating decision maker, or CODM, reviews financial information presented on an operating segment basis for purposes of making operating decisions and assessing financial performance. Our operating segments are equivalent to our reportable segments. We report our business in two primary reportable segments - the GPU business and the Tegra Processor business - based on a single underlying graphics architecture. Our GPU product brands are aimed at specialized markets including GeForce for gamers; Quadro for designers; Tesla and DGX for AI data scientists and big data researchers; and GRID for cloud-based visual computing users. Our Tegra brand integrates an entire computer onto a single chip, and incorporates GPUs and multi-core CPUs to drive supercomputing for autonomous robots, drones, and cars, as well as for game consoles and mobile gaming and entertainment devices. Under the single unifying architecture for our GPU and Tegra Processors, we leverage our visual computing expertise by charging the operating expenses of certain core engineering functions to the GPU business, while charging the Tegra Processor business for the incremental cost of the teams working directly for that business. In instances where the operating expenses of certain functions benefit both reportable segments, our CODM assigns 100% of those expenses to the reportable segment that benefits the most. The All Other category presented below represents the revenue and expenses that our CODM does not assign to either the GPU business or the Tegra Processor business for purposes of making operating decisions or assessing financial performance. The revenue includes primarily patent licensing revenue and the expenses include stock-based compensation expense, corporate infrastructure and support costs, acquisition-related costs, legal settlement costs, contributions, restructuring and other charges, product warranty charge, and other non-recurring charges and benefits that our CODM deems to be enterprise in nature. Our CODM does not review any information regarding total assets on a reportable segment basis. Reportable segments do not record intersegment revenue, and, accordingly, there is none to be reported. The accounting policies for segment reporting are the same as for our consolidated financial statements. The table below presents details of our reportable segments and the All Other category. GPU Tegra Processor All Other Consolidated (In millions) Year Ended January 27, 2019: Revenue $ 10,175 $ 1,541 $  $ 11,716 Depreciation and amortization expense $ 197 $ 47 $ 18 $ 262 Operating income (loss) $ 4,443 $ 241 $ (880 ) $ 3,804 Year Ended January 28, 2018: Revenue $ 8,137 $ 1,534 $ 43 $ 9,714 Depreciation and amortization expense $ 123 $ 37 $ 39 $ 199 Operating income (loss) $ 3,507 $ 303 $ (600 ) $ 3,210 Year Ended January 29, 2017: Revenue $ 5,822 $ 824 $ 264 $ 6,910 Depreciation and amortization expense $ 116 $ 29 $ 42 $ 187 Operating income (loss) $ 2,180 $ (9 ) $ (237 ) $ 1,934 Year Ended January 27, 2019 January 28, 2018 January 29, 2017 (In millions) Reconciling items included in "All Other" category: Unallocated revenue $  $ 43 $ 264 Stock-based compensation expense (557 ) (391 ) (247 ) Unallocated cost of revenue and operating expenses (277 ) (237 ) (215 ) Legal settlement costs (44 )  (16 ) Acquisition-related and other costs (2 ) (15 ) (23 ) Total $ (880 ) $ (600 ) $ (237 ) Revenue by geographic region is allocated to individual countries based on the location to which the products are initially billed even if our customers revenue is attributable to end customers that are located in a different location. The following table summarizes information pertaining to our revenue from customers based on the invoicing address by geographic regions: Year Ended January 27, 2019 January 28, 2018 January 29, 2017 Revenue: (In millions) Taiwan $ 3,360 $ 2,991 $ 2,546 China (including Hong Kong) 2,801 1,896 1,305 Other Asia Pacific 2,368 2,066 1,010 United States 1,506 1,274 904 Europe 914 768 659 Other countries 767 719 486 Total revenue $ 11,716 $ 9,714 $ 6,910 The following table summarizes information pertaining to our revenue by each of the specialized markets we serve: Year Ended January 27, 2019 January 28, 2018 January 29, 2017 Revenue: (In millions) Gaming $ 6,246 $ 5,513 $ 4,060 Professional Visualization 1,130 934 835 Datacenter 2,932 1,932 830 Automotive 641 558 487 OEM &amp; IP 767 777 698 Total revenue $ 11,716 $ 9,714 $ 6,910 The following table presents summarized information for long-lived assets by geographic region. Long-lived assets consist of property and equipment and deposits and other assets, and exclude goodwill and intangible assets. January 27, 2019 January 28, 2018 Long-lived assets: (In millions) United States $ 1,266 $ 928 Taiwan 137 58 India 44 40 China (including Hong Kong) 38 33 Europe 26 11 Other Asia Pacific 1 1 Total long-lived assets $ 1,512 $ 1,071 No customer represented 10% or more of total revenue for fiscal years 2019 and 2018. In fiscal year 2017, we had one customer that represented 12% of our total revenue. The revenue was attributable to the GPU business. Accounts receivable from significant customers, those representing 10% or more of total accounts receivable, aggregated approximately 19% of our accounts receivable balance from one customer as of January 27, 2019 , and approximately 28% of our accounts receivable balance from two customers as of January 28, 2018 .