The original walkie-talkie was a backpack
This walking radioman carries the bulky equipment that helped American infantry keep in touch on the move. The model's backpack set and M1 carbine identify a soldier whose essential task was communication, even though he still had to move with the unit and look after himself.
The SCR-300 family was associated with the name walkie-talkie; the smaller hand-held SCR-536 was known as the handie-talkie. Modern usage tends to blur the distinction. Seeing the radio carried on a man's back makes the older meaning of portable rather more tangible.
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