# Aiken code

> complementary binary-coded decimal which assigns a group of 4 bits to each decimal digit: 0→0000, 1→0001, 2→0010, 3→0011, 4→0100, 5→1011, 6→1100, 7→1101, 8→1110, 9→1111

**Wikidata**: [Q117643](https://www.wikidata.org/wiki/Q117643)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Aiken_code)  
**Source**: https://4ort.xyz/entity/aiken-code