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Hydrogen Technologies Standards form the basic framework for market ramp-up
More information
Climate change Standards and specifications support climate targets
More information
Smart Farming Standards and specifications are drivers for the digitalization of agriculture
More information

Standards [CURRENT]

NF Z89-640 ; NF ETS 300640:2000-04-01
Human Factors (HF) - Assignment of alphabetic letters to digits on standard telephone keypad arrays

Title (German)

Menschliche Belange - Zuordnung des Buchstabenalphabets zu den Ziffern auf genormten Telefontastaturanordnungen

Edition 2000-04-01

Original language French

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Hydrogen Technologies Standards form the basic framework for market ramp-up

Climate change Standards and specifications support climate targets

Smart Farming Standards and specifications are drivers for the digitalization of agriculture

NF Z89-640 ; NF ETS 300640:2000-04-01 Human Factors (HF) - Assignment of alphabetic letters to digits on standard telephone keypad arrays

Want to learn more?

NF Z89-640 ; NF ETS 300640:2000-04-01
Human Factors (HF) - Assignment of alphabetic letters to digits on standard telephone keypad arrays