| Schedule of disaggregation of revenue |
Revenue by Major Products/Service Offerings | | | | | | | | | | | | | | (Dollars in millions) | | | | | | For the three months ended March 31: | | 2020 | | 2019 | | Cognitive Applications | | $ | 1,182 | | $ | 1,238 | * | Cloud & Data Platforms | | | 2,536 | | | 1,917 | | Transaction Processing Platforms | | | 1,520 | | | 1,812 | | Total Cloud & Cognitive Software | | | 5,238 | | | 4,967 | * | Consulting | | | 2,071 | | | 2,001 | * | Application Management | | | 1,840 | | | 1,908 | | Global Process Services | | | 225 | | | 247 | | Total Global Business Services | | | 4,136 | | | 4,155 | * | Infrastructure & Cloud Services | | | 4,916 | | | 5,209 | | Technology Support Services | | | 1,550 | | | 1,665 | | Total Global Technology Services | | | 6,467 | | | 6,875 | | Systems Hardware | | | 997 | | | 914 | | Operating Systems Software | | | 371 | | | 414 | | Total Systems | | | 1,368 | | | 1,328 | | Global Financing** | | | 299 | | | 406 | | Other | | | 62 | | | 451 | * | Total revenue | | $ | 17,571 | | $ | 18,182 | |
* Recast to conform to current period presentation. Refer to note 4, “Segments,” for additional information. ** Contains lease and loan/working capital financing arrangements which are not subject to the guidance on revenue from contracts with customers. Revenue by Geography | | | | | | | (Dollars in millions) | | | | | For the three months ended March 31: | | 2020 | | 2019 | Americas | | $ | 8,166 | | $ | 8,493 | Europe/Middle East/Africa | | | 5,517 | | | 5,727 | Asia Pacific | | | 3,888 | | | 3,961 | Total | | $ | 17,571 | | $ | 18,182 |
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| Schedule of reconciliation of contract balances |
| | | | | | | | | At March 31, | | At December 31, | (Dollars in millions) | | 2020 | | 2019 | Notes and accounts receivable — trade (net of allowances of $337 and $299 at March 31, 2020 and December 31, 2019, respectively) | | $ | 6,927 | | $ | 7,870 | Contract assets (1) | | | 488 | | | 492 | Deferred income (current) | | | 13,377 | | | 12,026 | Deferred income (noncurrent) | | | 3,769 | | | 3,851 |
| (1) | Included within prepaid expenses and other current assets in the Consolidated Balance Sheet. |
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