Abstract: A system is described with a plurality of keys, five of the keys representing all of the letters of an alphabet. The five keys are arranged to form two to three rows of keys. A first row includes two of the five keys and a second row includes at least two other keys of the five keys. The keys are hard keys and/or virtual keys.

Abstract: A system comprising a first device having a touch screen a messaging application running in the background within said first device and a window related to said application, said window, regardless of the window of any other application displayed on the screen, is located on an edge of said touch screen while said messaging application is running, wherein upon providing a gesture from said window of said messaging application towards inside of said touch screen, a function related to said messaging application is executed.

Abstract: A keyboard is divided into a number of large zones each large zone having a number of small zones. The large zones, together, include substantially all of the letters of a language. A word predictive system analyzes the user's interaction with the large zones relating to the small zones to predict a word.

Abstract: A system of controlling a content comprising a content, a number of controlling conditions and/or a number of controlling means, wherein the visibility of at least portion of said content is defined and controlled by using at least one of said controlling conditions and/or controlling means.

Abstract: A data entry system, having an input interface adapted to identify a plurality of user interactions. The system includes a processor adapted to associate user interactions identified by the input interface with a plurality of letters of the alphabet, such that all the letters of the alphabet are assigned to at most eight user interactions. Most of the letters are assigned to specific user interactions according to one or more features of their shape in their printed form, such that most of the letters assigned to each user interaction have the same shape feature.

Abstract: A data entry system including a plurality of first keys, a plurality of second keys, a display and a processor adapted to interpret a first type of user interaction with the first keys as entrance of one or more characters and to interpret a second type of interaction with the first keys as mode signals which change the meanings of at least three of the second keys.