Music was once used as a form of long-distance communication.

Suicide is sometimes used as a form of killing other people.

From the start they used music as a powerful form of protest.

He also agreed that the practice should not be used as a form of birth control.

They are used as a form of both entertainment and instruction.

Fines can also be used as a form of tax.

This is often used as a form of knowledge representation.

Some women use this information as a form of birth control.

It may also be used as a form of bullying.

Some schools use street dance as a form of physical education.