余码

excess code (i.e. the unused bits in binary-coded decimal)

surname Yu

(archaic) I / me / variant of 餘|余[yu2], surplus

extra / surplus / remaining / remainder after division / (following numerical value) or more / in excess of (some number) / residue (math.) / after / I / me

weight / number / code / to pile / to stack / classifier for length or distance (yard), happenings etc