AS 2250-1979

1 - AS 2250-1979 OFFICE MACHINES AND DATA PROCESSING EQUIPMENT - KEYBOARD LAYOUTS FOR NUMERIC APPLICATIONS
4 - PREFACE
5 - 1 SCOPE
5 - 2 FIELD OF APPLICATION
5 - 3 REFERENCE
5 - 4 LAYOUT
5 - 4.1 Numerals
5 - 4.2 Zero/decimal areas
6 - 4.3 Additional keys
6 - 4.3.1 Character “decimal sign”
6 - 4.3.2 Character “space” (SP)
7 - 4.3.3 Character “minus” (- )

Specifies the layout of numerals on keyboards for data processing equipment and all office machines, including calculators. This Standard is technically identical with ISO 3791.

This International Standard specifies the basic layout of numerals and symbols on keyboards intended to beused in applications where the data are generally numeric.This International Standard is intended for use in establishing complete keyboard layouts for particular machines. It is applicable to both office machines and data processing equipment, and to both numeric and alpha-numeric keyboards. It does not apply to alphanumeric keyboards with an in-board numeric cluster. The layouts described in this International Standard are concerned only with the nominal relative positions of keys; they are not intended to define physical factors, such as key spacing, keyboard slope, size and shape of keytops, nor the way in which the keytops are inscribed. The definition of such physical factors may be the subject of other International Standards. 1)