The relationship between informal and formal systems is a critical issue.

Therefore, a starting point for any discussion of community care must be a realistic appraisal of informal systems.

The previous informal system could not deal with this unlikely eventuality.

To resolve the ambiguity an informal nicknaming system comes into play which recognizes where a person is from.

It said the agency promoted agents through an informal system based on friends and influential contacts.

This informal collaborative system of tag creation and management has been called a folksonomy.

The Scout method is the informal educational system used by Scouting.

Nine out of ten employers stated that their workers were involved in health and safety management through either formal or an informal system.

An informal system that had worked for centuries.

An informal system of listings decided how frequently an actor would be cast.