A letterform is a type of glyph, which is a specific, concrete way of writing an abstract character or grapheme.
For example, medieval scholars may discuss the particular handwritten letterforms that distinguish one script from another.
[2] The history of letterforms is discussed in fields of study relating to materials used in writing.
Epigraphy includes the study of letterforms carved in stone or other permanent materials.
Calligraphy treats the letterforms of decorative writing, usually in ink.