early 13c., "to get by heart," from O.Fr. recorder "repeat, recite, report," from L. recordari "remember, call to mind," from re- "restore" + cor (gen. cordis) "heart" (as the metaphoric seat of memory, cf. learn by heart); see heart. Meaning "set down in writing" first attested c.1300; that of "put sound or pictures on disks, tape, etc." is from 1892.
c.1300, "testimony committed to writing," from O.Fr. record, from recorder "to record" (see record (v.)). Meaning "written account of some event" is from 1611. Meaning "disk on which sounds or images have been recorded" is first attested 1878. That of "best achievement in sports, etc." is from 1883. Phrase on the record is from 1900; adv. phrase off the record "confidentially" is attested from 1933.