Abstract: The present invention concerns a portable unit for the input of data in a digital device, which unit comprises a control panel (1) upon which is provided a table (2) with a group of symbols (16) in a number of fields (13), and a base plate (3) with pressure contacts (4, 5). The unit comprises two selection elements (8, 9) which can be moved parallel to the rows (14) and the columns (15) of the table (2) until they are situated opposite to or above a pressure contact (4, 5) in the extension of a selected row (14) or column (15), a pressure mechanism (7) to change the position of the pressure contacts (4, 5) by means of the selection elements (8, 9) situated opposite to or under the latter, and a number of additional pressure contacts (6) which can be manually operated, whose number is equal to the maximum number of symbols (16) of a filed (13).