A keyboard part-to-whole relationship usually means: “Which item is a part, and which is the complete object it belongs to?” For a keyboard, common part → whole pairs are:

  • Keycaps → keyboard
  • Switches → keyboard
  • Spacebar key → keyboard
  • Enter key → keyboard
  • Alphanumeric keys → keyboard
  • Function keys (F1–F12) → keyboard
  • Navigation keys (arrows, Home, End) → keyboard
  • Numeric keypad → keyboard
  • PCB (printed circuit board) → keyboard
  • Plate → keyboard
  • Case (top and bottom shell) → keyboard
  • Keyboard feet/legs → keyboard

In word-relationship questions (like on tests or puzzles), an example analogy using this idea would be:

Keycap : Keyboard :: Wheel : Car

Because in both pairs, the first word is a physical part of the second.

Information gathered from public forums or data available on the internet and portrayed here.