Related:

• BD: Backspace Disk
• Parts of this product may be derived from UNIX and Berkeley 4.
  3 BSD systems... -- Label on Solaris 2.x disk...
• BCM - Backspace Core Memory
• BCR: Backspace Card Reade
• BSP: BackSpace Punch
• BSST: BackSpace and Stretch Tape
• My mouth doesn't seem to have a backspace key ...
• 4.2 BSD UNIX #57: Sun Jun 1 23:02:07 EDT 1986 You swing at the Sun.
  You miss. The Sun swings. He hits you with a 575MB disk!...
• wirling baton n. [PLATO] The overstrike sequence -/|\-/|\- which produces an animated twirling baton.
  If you output it with a single backspace between characters, the baton spins in place....