the.com/digits
The original counting machines, attached to your hands, perpetually within reach.
means The single numerals zero through nine, or by extension the fingers and toes humans first counted on.
from From Latin digitus, finger or toe — proof that humanity learned math by staring at its own hands.
Base tenWe count by tens because we have ten fingers.
AnatomyFingers and toes are still literally called digits.
Zero lateThe digit zero arrived centuries after the others.