olemus
ISO/IEC 2382:
kahendkoodesitus, milles
iga kümnendnumber esitatakse kahendarvuga
=
binary-coded notation in which each of the decimal digits is separately represented by a binary numeral

näide
17₁₀ kood on 0001 0111_BCD ,
kuid 17₁₀ väärtus kahendarvuna on 10001₂

ülevaateid
https://en.wikipedia.org/wiki/Binary-coded_decimal

https://www.electronics-tutorials.ws/binary/binary-coded-decimal.html