Abstract: A grid for use to select and enter data into a computer, which comprises a planar surface on which selective elements, preferably consisting of beads, are movably mounted. Each element can be introduced onto the planar surface between a set of predetermined locations that preferably extend along a slot and each corresponds to one of the data to be entered. Each slot corresponds to a question. For each question, the grid offers several positions which correspond to a corresponding number of responses. Once all the responses are given, the grid can be read by a suitable reader connected to a microcomputer, the process being simple, fast, reliable and not expensive. The grid and its reader can be part of a kit also including a software to be inserted and used by the computer to which the reader is connected, for compiling the information that is transmitted to this computer by the reader.