Soviet KOI-7

Soviet KOI-7 is the earliest Soviet standard. It is a 7-bit character set, using only numerical values below 128. It is most often used for telecommunication. This is the only character set which contains no Latin letters at all. Note also that it does not contain the upper case Russian tvyordyj znak, which you might have expected to find at #127. Registered with ISO on May 30, 1979, Registration No. 37.

Notes: 1) Character #32 is a space, #127 is the ASCII delete.