KOI (КОИ) is a family of several code pages for the Cyrillic script.The name stands for Kod Obmena Informatsiey (Russian: Код Обмена Информацией) which means "Code for Information Interchange". A particular feature of the KOI code pages is that the text remains human-readable when the leftmost bit is stripped, should it inadvertently pass through equipment or software that can only deal with 7 bit wide characters. This is due to characters being placed in a special order (128 codepoints apart from the Latin letter they sound most similar to), which, however, does not correspond to the alphabetic order in any language that is written in Cyrillic and necessitates the use of lookup tables to perform sorting.