olemus
Wiktionary:
(computing) a code that uses the binary digits (0 and 1), usually in groups of eight, to represent characters, machine instructions or other data

enamasti
kahendsüsteemil põhinev numberkood,
näiteks ASCII, UTF-32

ülevaateid
https://en.wikipedia.org/wiki/Binary_code

https://www.tutorialspoint.com/computer_logical_organization/binary_codes.htm

vt ka
- Gray kood, peegelkahendkood
- kahend-kümnendesitus