old documents / (in palaeography) historical documents written to convey a specific intention between a sender and receiver; generally inclusive of written material through the mid-19th century

paleography

(obsolete, orthography) Synonym of 半濁点 (handakuten) / (typography) an emphasis point, a dot or similar mark attached to a character to display emphasis

to use / to employ / to make use of, to apply / to spend

format

the past / ancient times

(not of a person) old, aged, antiquated

old

use one thing for many purposes / work someone hard

to use one's head