A data entry system having a plurality of a first type of input means, such as keys, to provide input signals to which symbols, such at least the letters of the alphabet of at least one language, are distributively assigned, and such that at least two of the letters are assigned to at least one of the input means, and wherein pressing a key may provide a first input information that ambiguously correspond to any of the letters and a second input information for supporting using a second type of input means for entering unambiguous letters, and wherein the data entry system supports at least one database of words such that in order to enter a desired word of said at least one database, a user of said system selects one or two input methods.