An aim board with four circular rings and a stand of two legs facing side. 

Aim Board With Stand

An oven with a stove on top, and an opened door and gas dials or knobs.

Oven With Stovetop And Open Door

A sausage curling in the shape of a ring.

A ring donut with chocolate icing covered with candy sprinkles seen from above.

A set of ropes for a boxing ring mounted on two posts.

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