Basically, the research can be grouped into three main areas: hardware, software and business layer.

There are a total of 52 areas grouped into 11 histological areas.

Extreme programming has been described as having 12 practices, grouped into four areas:

In general, smart grid technology can be grouped into five key areas:

The changes that happen in this period are often grouped into five areas:

These can be grouped into three subject areas: business and horticulture.

Most of the colleges located in Durham itself can be grouped into two areas of the city.

The conservation districts in Oklahoma are grouped into five areas in the state.

The authorities are grouped into three areas for the provision of fire and rescue services.

The mines are grouped into 13 areas for administration purposes.