変へん形けい周しゅう波は数すう変へん調ちょう記き録ろく

noun

modified frequency modulation recording; MFM recording

A magnetic recording method used in early hard disk drives and floppy disks; a technical computing term.

• 変へん形けい周しゅう波は数すう変へん調ちょう記き録ろくは、古ふるいハードディスクで使つかわれていた技ぎ術じゅつです。

  Modified frequency modulation recording is a technology used in old hard disks.