Human Factors (HF) - Assignment of alphabetic letters to digits on standard telephone keypad arrays
NORM herausgegeben am 1.7.1997
Designation standards: ČSN ETS 300640-ed.1
Classification mark: 873002
Catalog number: 22275
Publication date standards: 1.7.1997
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Kategorie: Technische Normen ČSN