A circle with a thin outline and a smaller circle at the center.

Concentric Circles

Two vertical lever arch file folders with a circle on the spine of each one.

Lever Arch Folders With Circles On Spines

An eye with circular lines around the iris.

A busy and overworked manager or employee surrounded by charts, graphs, and notifications.

Two circle shapes with many colors: a small one overlapping a bigger one with a contrasting effect.