These can be roughly grouped into two categories:

They have also been grouped roughly according to shape and size, which makes for some interesting juxtapositions.

The methods may be roughly grouped under the following headings.

System calls can be roughly grouped into five major categories:

From simplest to most sophisticated they can be roughly grouped into the following areas:

The people would be grouped roughly by ethnicity.

Many cultures have stories describing the origin of the world, which may be roughly grouped into common types.

Unintended consequences can be roughly grouped into three types:

These ingredients can be roughly grouped into four groups:

His music can be grouped roughly in accordance with the different periods in his life.