When I took abstract algebra in Berkeley years ago, they were taught but they weren't the focus of the course. Basically, they're an example of skew field (divi

When I took abstract algebra in Berkeley years ago, they were taught but they weren't the focus of the course. Basically, they're an example of skew field (division ring) so they have some interesting properties that was briefly studied. But obviously, one has to study more to understand their applications.