Human Factors (HF);Assignment of alphabetic letters to digits on standard telephone keypad arrays (Endorsed by Asociación Espanola de Normalización in December of 2022.)
NORMA vydána dne 1.12.2022
Designation standards: UNE-ETS 300640ED1
Publication date standards: 1.12.2022
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Kategorie: Technické normy UNE