- bookkeeper (n.)
- also book-keeper, 1550s, from book (n.) + keeper. A rare English word with three consecutive double letters. Related: Bookkeeping, which is from 1680s in the sense "the work of keeping account books;" book-keep (v.) is a back-formation from 1886.
- post (v.2)
- in bookkeeping, "to transfer from a day book to a formal account," 1620s, from post (n.2) via a figurative sense of "carrying" by post horses. Related: Posted; posting.
- up-to-date (adv.)
- 1840, "right to the present time," from phrase up to date, probably originally from bookkeeping. As an adjective from 1865. Meaning "having the latest facts" is recorded from 1889; that of "having current styles and tastes" is from 1891.