I hope that you enjoyed Saturday’s Mac Riddles, episode 193. Here are my solutions to them.
1: Pianist’s notes for typing and shortcuts.
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keyboard
Pianist’s notes (piano keyboard) for typing and shortcuts (what you use your keyboard for).
2: Stiff card on a hardback to contain what’s copied.
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pasteboard
Stiff card on a hardback (pasteboard is used for the covers of hardback books) to contain what’s copied (what the pasteboard does in macOS).
3: Manages apps with assertions down the side of a car.
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RunningBoard
Manages apps with assertions (what it does inside macOS) down the side of a car (the running board).
The common factor
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They all end with -board.
I look forward to your putting alternative cases.