Abstract: A data input system is provided which comprises a processor, and a key array coupled to said processor, wherein said key array comprising at least one soft-key, at least one multi-directional pointing key for navigate a cursor and a conventional 3×4 telephone soft-key array for data selections; wherein said at least one soft-key includes a “backspace” key to delete a prior input data, a “space” key to add a space after said prior input data, or a “List/Fix” key to display a list of letter on a display for user to fix or list ambiguous letter/word presented by an input string.