Microsoft has started offering an iPad edition of its Office software suite.
It was announced at the first launch event hosted by Satya Nadella since he became chief executive of the firm.
Three separate productivity apps are available - Word, Excel and Powerpoint - each of which has been optimised for touch-based controls.
Within hours of the launch, Word became the most downloaded application for iPads in Apple's app store.
The Excel and Powerpoint apps were the third and fourth most popular free app downloads, respectively, in the store