.doc

Word 97-2003 document, Microsoft Word's binary OLE compound file format for word processing

Handled by macOS itself

Format facts

MIME type: application/msword
Apple UTI: com.microsoft.word.doc
Stock Quick Look: macOS renders a preview
Planned approach (census): native-sufficient
Icon hint: unknown
Prevalence: universal

Renderer note (from the census)

macOS previews via its Word text converter; formatting-grade

Gotchas: legacy binary text extraction hard