Dongle
The OED glosses dongle as "A software protection device which must be plugged into a computer to enable the protected software to be used on it", and gives the earliest citation as
1982 MicroComputer Printout Jan. 19/2 The word ‘dongle’ has been appearing in many articles with reference to security systems for computer software [refers to alleged coinage in 1980].
(The etymology is given as [Arbitrary], which seems a bit harsh.)
But Suzanne Kemmer recently observed in an email to me that "people are using "dongle" to mean anything that can plug into a USB port, and since for most users that is a flash drive, 'dongle' can now be used for a garden-variety flash drive".
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