Topic summary
Slob-octal
Extracted from the Wikipedia article Split octal.
Syllabic octal
Machine code programming used an unusual form of octal, known locally as 'bastardized octal'. It represented 8 bits with three octal digits but the first digit represented only the two most-significant bits (with values 0..3), whilst the others the remaining two groups of three bits (with values 0..7) each. A more polite colloquial name was 'silly octal', derived from the official name which was syllabic octal (also known as 'slob-octal' or 'slob' notation,).