Calculators and adding machines. Layout of function keys on adding machines.
NORM herausgegeben am 31.5.1977
Designation standards: BS 5478-2:1976
Note: UNGÜLTIG
Publication date standards: 31.5.1977
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategorie: Technische Normen BS