【电】 four-track recording
four
【医】 quadri-; Quat; quattuor; tetra-
【计】 sound track
record; mark; register; account; memorize; report; take notes
【计】 design development record; posting; REC; record
【医】 protocol; reading; register; registration
【经】 entry; keeping of record; mark; record; record keeping; records