When file backups are made, the tape reel number(s) are recorded in the file directory.

Write protection was provided by a removable plastic ring in the back of the tape reel.

The song featured just eight lines of nursery rhyme-like lyrics repeated over a distinctive vibrato piano (achieved by manipulating the recorded tape reel) and electric guitar backing.

With a sense of reverence, my dad unpacked a box of dusty tape reels and spooled them on to the humming machine.

For backup, there was removable media; magnetic tape reels and cartridges, floppy disks and removable hard drives.