Abstract: In one embodiment, a method includes displaying a first one of a plurality of touch-screen keyboards on a touch-screen display of a computing device; and, in response to a touch gesture comprising a path comprising two or more points on the touch-screen display, displaying a second one of the keyboards on the touch-screen display in place of the first one of the keyboards.

Abstract: In one embodiment, a method includes displaying a keyboard on a touch-screen of a computing device; in response to a touch gesture within a display area of the touch-screen, the touch gesture comprising one or more paths that comprise two or more points on the touch-screen, determining a particular one of a plurality of characters corresponding to the touch gesture; and entering the particular one of the characters as user input to the computing device.

Abstract: In one embodiment, a method includes identifying a three-dimensional gesture made by a user of a computing device with respect to one or more surfaces of the computing device, the three-dimensional gesture comprising a trajectory in three dimensions, a first portion of the trajectory comprising a touch of one or more of the surfaces, a second portion of the trajectory comprising a series of points in space distant from the surfaces; determining a user input based on the three-dimensional gesture; and executing one or more actions based on the user input.

Abstract: In one embodiment, a method includes receiving data uniquely identifying a particular user to the verification authority and a request to access a shared device. The shared device being configured for use by at least a number of users. The method also includes accessing a social graph of the particular user to determine whether one or more users in the social graph have previously accessed the shared device; and displaying on a display of the mobile device information indicating which of the users in the social graph have previously accessed the shared device.

Abstract: In one embodiment, a method includes receiving access data from an application on a mobile device of a particular user. The access data includes authentication data associated with a shared device and a digital credential associated with the mobile device. The shared device is configured for use by at least a number users. The method also includes authenticating the access data based on a comparison of the access data with verification data stored by the verification authority; and transmitting to the shared device a digital certificate signed by the verification authority in response to the authentication. The signed digital certificate provides the particular user access to the shared device.

Abstract: In one embodiment, collecting a plurality of words from texts submitted by one or more users; for each of a plurality of communication categories, determining a usage frequency of each of one or more of the words within the communication category based on the texts; and constructing one or more customized dictionaries that each comprise a different blending of selected words.

Abstract: In one embodiment, constructing a set of customized dictionaries for a particular user, each of the customized dictionaries in the set comprising a different blending of one or more frequently used words collected from texts submitted by one or more users; and sending a copy of the set of customized dictionaries to each of a plurality of electronic devices associated with the particular user to be stored on the electronic device and to aid the particular user in inputting text to the electronic device.

Abstract: In one embodiment, constructing one or more customized dictionaries for a particular user, each of the customized dictionaries comprising a different blending of one or more frequently used words collected from texts submitted by one or more users; and in response to the user inputting text to an electronic device, selecting one of the customized dictionaries and utilizing it to aid the particular user in inputting text.

Abstract: In one embodiment, constructing one or more customized dictionaries for a particular user, each customized dictionary comprising a different blending of one or more frequently used words collected from texts submitted by one or more users; determining one or more customized advertisements for the particular user based on the customized dictionaries; and presenting the customized advertisements to the particular user.

Abstract: In particular embodiments, one or more images associated with a primary user are received. The image(s) may comprise single images, a series of related images, or video frames. In each image, one or more faces may be detected and/or tracked. For each face, one or more candidates are selected who may be identified with the face. Each candidate may be connected to the primary user within a social network. A candidate score for each candidate associated with a detected face. Finally, the winning candidate is determined, and a suggestion to identify the detected face as being the winning candidate is presented. Some embodiments may operate upon video clips as the video is captured by a mobile device. Some embodiments may operate upon series of images as they are uploaded to or viewed on a website.