Arzubi is testing a service, called Nabla Copilot, that sits in on his part of virtual patient visits and then automatically summarizes them, organizing into a standard note format the complaint, the history of illness, and a treatment plan.

Nabla Copilot isn’t the only such service; Microsoft is trying out the same concept.

It boasts an unusually large range of special characters, from triple prime and nabla to a full set of astronomical symbols and the ‘click’ phonemes found in some African languages.

But what is that sound I hear, Nabla?—

But how much better, O most sagacious Ulpian, is this hydraulic organ, than the instrument which is called nabla; which Sopater the parodist, in his drama entitled Pylæ, says is also an invention of the Phœnicians, using the following expressions— Nor is the noise of the Sidonian nabla, Which from the throat doth flow, at all impair'd.