portfolio - a big, flat, slim case for carrying unfastened papers or drawings or maps; usually leather-based; "he remembered her because she was carrying a sizable portfolio" case - (printing) the receptacle during which a compositor has his type, which is split into compartments for the various letters, Areas, https://ricardovkjwd.amoblog.com/harvard-case-study-help-no-further-a-mystery-57547356