Within the general scope described in ISO/IEC 9995‑1, this document specifies the alphanumeric section of a keyboard and the division of that section into zones; the arrangement, number, and location of the keys in the alphanumeric zone ZA0 of the alphanumeric section; and the layout, allocation and effect of several control functions to the keys in the function zones of the alphanumeric section.
BSI recommends this version of standard for organisations operating in or with the UK. The ISO edition is available here if required.