Revenue increased $13.8 billion or 14%, driven by growth across each of our segments. Productivity and Business Processes revenue increased, driven by LinkedIn and higher revenue from Office. Intelligent Cloud revenue increased, primarily due to higher revenue from server products and cloud services. More Personal Computing revenue increased, driven by higher revenue from Gaming, Windows, Search advertising, and Surface, offset in part by lower revenue from Phone.
Operating income increased $6.0 billion or 21%, driven by growth across each of our segments. LinkedIn operating loss increased $63 million to $987 million, including $1.5 billion of amortization of intangible assets. Operating income included a favorable foreign currency impact of 2%.
Key changes in expenses were:
Cost of revenue increased $4.1 billion or 12%, mainly due to growth in our commercial cloud, Gaming, LinkedIn, and Search advertising, offset in part by a reduction in Phone cost of revenue.
Sales and marketing expenses increased $2.0 billion or 13%, primarily due to LinkedIn expenses and investments in commercial sales capacity, offset in part by a decrease in Windows marketing expenses.
Research and development expenses increased $1.7 billion or 13%, primarily due to investments in cloud engineering and LinkedIn expenses.
General and administrative expenses increased $273 million or 6%, primarily due to LinkedIn expenses.