Related:

• PCD: PunCh Disk
• PDSK: Punch DiSK
• PD: Play Dead
• Public Utility: Is that Shareware or P.D.??
• Proposed Additions to the PDP-11 Instruction Se
• 0395 Have you ever paged or swapped off a tape drive?
  0396 ... Off a card reader/punch? 0397 ... Off a teletype?...
• Understanding is always the understanding of a smaller problem in relation to a bigger problem.
  -- P.D. Ouspensky...
• BSP: BackSpace Punch
• ECP Erase Card Punch