sorter

nouns

a clerk who sorts things (as letters at the post office)
is derived from
is a type of (narrower)
an employee who performs clerical work (e.g., keeps records or accounts)
a machine for sorting things (such as punched cards or letters) into classes
is derived from
is a type of (narrower)
any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks