It's nice to be able to learn which industrial design firm created a ubiquitous object. I've discovered the GoDaddy Poynt Smart Terminal, which you've surely interacted with, was done by ID firm Bould Design. The San-Francisco-based firm is headed up by double-threat Fred Bould (he's both ID and ME).

As the firm writes:

"The Go Daddy Poynt Smart Terminal is a careful integration of form and function. Two displays, a printer, camera and three payment technologies converge in a flowing, tactile form that artfully reflects the internal component architecture."

"The main UI elements are integrated into a sleek, black top surface while the lightly textured white bottom housing wraps around the componentry, effecting Poynt's hallmark curvilinear profile."

"The technology integration is both eminently functional and seamless at the same time. Poynt's devotion to design has yielded a functionally excellent product and an artful expression of design and technology."

You can see more of Bould Design's work here.