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Human Factors (HF) - Assignment of alphabetic letters to digits on standard telephone keypad arrays
STANDARD published on 1.7.1997
Designation standards: ČSN ETS 300640-ed.1
Classification mark: 873002
Catalog number: 22275
Publication date standards: 1.7.1997
SKU: NS-172034
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
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Latest update: 2024-04-28 (Number of items: 2 896 137)
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