Device's international power plug (4)

I believe the answer is:

ipad

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'device's' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'international power plug' is the wordplay.
'international' becomes 'i' (abbreviation eg in IMF).
'power' becomes 'p' (symbol in physics).
'plug' becomes 'ad' (as in plugging a product).
'i'+'p'+'ad'='IPAD'

Can you help me to learn more?

(Other definitions for ipad that I've seen before include "Small personal computer" , "Tablet computer from Apple" .)

I've seen this clue in The Guardian.

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