As computer desktop publishing became commonplace, typewritten manuscripts became less relevant and most style guides stopped making distinctions between manuscripts and final typeset products.
During the 20th century, style guides commonly mandated two spaces between sentences for typewritten manuscripts, which were used prior to professionally typesetting the work.
Individuals receiving typewritten letters often found them insulting (as type implied they could not read handwriting) or impersonal, problems exacerbated by the all upper-case writing.