IPA: /ˈsɔːrtər/
KK: /ˈsɔrtər/
A device or person that organizes items into different categories or groups.
The sorter quickly arranged the papers into the correct files.
Sorter → It is formed from "sort" (from Old French *sorte*, meaning a category or kind) and "-er" (meaning a person who). A sorter is a person who categorizes or arranges items into different kinds or categories.
Think of someone who categorizes things into different 'kinds' ('sort') — that's what a sorter does.