Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for performing dynamic, stroke-based alignment of touch displays. In one aspect, a method include providing, for output by a first mobile computing device that (i) has a first proximity sensitive display and (ii) has been designated a primary display device, a primary alignment user interface. The methods also includes transmitting, by the first mobile computing device to a second mobile computing device that (i) has a second proximity sensitive display and (ii) has been designated a secondary display device, an instruction to output a secondary alignment user interface.

Abstract: Methods, systems, and apparatus, including computer programs stored on a computer storage medium, for determining a respective sampling rate for plurality of authors based on respective ranks assigned to the authors by a user, sampling one or more items for each of the authors according to the respective sampling rate for the author, and providing the sampled items for presentation to the user.

Abstract: An optimal recognition for handwritten input based on receiving a touch input from a user may be selected by applying both a delayed stroke recognizer as well as an overlapping recognizer to the handwritten input. A score may be generated for both the delayed stroke recognition as well as the overlapping recognition and the recognition corresponding to the highest score may be presented as the overall recognition.

Abstract: One or more sensors of a mobile computing device may detect a current movement characteristic of the mobile computing device and a current orientation characteristic of the mobile computing device, the current movement characteristic and the current orientation characteristic being based at least in part on a path of motion of the mobile computing device. An estimated path of motion may be defined based on the current movement characteristic and the current orientation characteristic. One or more characters based at least in part on the estimated path of motion may be identified. A graphical representation of the one or more characters may be inserted into a text input field, the graphical representation of the one or more characters and the text input field being outputted at a display of the mobile computing device.