User:Alain

From MobileDesign

« Helvedial » is an alphanumeric keyboard/dial allowing and easier and faster data capture than with current models of Phone dials and alphanumeric keyboards/keypads, “inverted” or not, thanks to the addition of 3 keys.

A « Helvedial » dial/keyboard consists of twelve keys, numbered from 1 to 12, and a thirteenth key, numbered zero,

Each of these thirteen keys can therefore be associated with two of the 26 letters of the Latin alphabet, in ascending order, the zero being associated with the letters Y and Z.