TOTALLY BUZZED What's A Dongle?

First let's say this has nothing to do with sex.
Meanwhile back to our ongoing mission of new klitchy buzzed terms and we hit upon the 'dongle'. By most accounts this is a computer hardware device which fits to your computer.
In days past say dongle 1.0 its primary purpose in life was a secure device enabling senstive software to run. Nowdays we are into dongle 2.0 and it's oftentmies a connector for wi-fi by telecommunictions companies.
We aren't quite sure what the next incarnaton will have in store for the dongle, but as a hotel brand there might have some challenges.