Within the general scope described in lSO/IEC 9995-1, this part of lSO/IEC 9995 specifies the allocation of
letters to the keys of the numeric zone ZN0 of a keyboard which has the ten digits zero to nine allocated in the
“1-2-3” layout. The layout specified in this part of lSO/IEC 9995 is intended for applications of information
technology equipment keyboards where letters instead of digits are used for the mnemonic retention of
numeric information.
The use of letters on the numeric zone ZN0 for the mnemonic retention of numeric information is strongly
deprecated on keyboards which also contain an alphanumeric section. The inclusion of two sets of
alphabetical symbols used in different ways could confuse the user of the keyboard.