標準號：IS 11412-1986
發布日期：1986/3/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This International Standard defines layouts for the alphanumeric area of a keyboard implementing the 95 graphics positions of the ISO 7-bit coded character set complying with ISO 646, 7-bit coded character set for information processing interchange.These layouts conform to ISO/R 2126, Basic arrangements for the alphanumeric section of keyboards operated with both hands.This International Standard specifies the pairing of the characters and their allocation to the keys. The pairing rule is such that, when considering the code combinations corresponding to the graphics, it follows the principle of simple bit inversion (bit pairing), i.e. the characters of columns 2, 4 and 5 are paired with those of the corresponding rows of columns 3, 6 and 7 respectively. Full bit pairing applies, however, only to the 48-key layouts.The layouts included are concerned only with the nominal relative position of the keys; they do not define physical factors, such as key spacing, keyboard slope, shape and size of keytops and of the space bar, nor the way in which the keytops are labelled.The key position numbers are shown for reference purpose only. For reference, the ISO 7-bit basic code table with its notes and the International Reference version are included as annex B.