Table:
|  |  | Fiscal |  |  |  |
| --- | --- | --- | --- | --- | --- |
|  | 2019 |  | 2018 (1) |  |  |
|  | Operating Income | Operating Margin | Operating Income | Operating Margin | Increase (Decrease) |
|  |  |  | (in millions of U.S. dollars) |  |  |
| Communications, Media & Technology | $1,555 | 18% | $1,380 | 17% | $175 |
| Financial Services | 1,238 | 15 | 1,365 | 16 | (128) |
| Health & Public Service | 739 | 10 | 766 | 11 | (27) |
| Products | 1,720 | 14 | 1,664 | 15 | 56 |
| Resources | 1,053 | 16 | 724 | 12 | 330 |
| TOTAL | $6,305 | 14.6% | $5,899 | 14.4% | $406 |
Paragraphs:
Operating Income and Operating Margin
Operating income for fiscal 2019 increased $406 million, or 7%, over fiscal 2018.
Operating income and operating margin for each of the operating groups were as follows:
Amounts in table may not total due to rounding.
(1) Effective September 1, 2018, we adopted FASB ASU No. 2017-07, Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. Certain components of pension service costs were reclassified from Operating expenses to Non-operating expenses. Prior period amounts have been revised to conform with the current period presentation.
Question:
What is the company's main source of operating income in 2019?
Answer: Because $1,720 is the highest operating income gained from any operating group in 2019, the answer is: Products.