Doesn't shed any light on the history, though.
In Egypt, currency is also the pound, the £ sign is not out of use, it is uncommon, because the is not accessible on the layouts that are most used there.
But in any case pounds sign isn't forced by generalizations about English morphology.
An example filename would be.
Hashtags are attached to keywords or phrases to identify messages on a particular topic — for example, lifewire.
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