1 Associations. 2  Associations between actors and use cases are indicated in use case diagrams by solid lines. 3  An association exists whenever an actor is involved with an interaction described by a use case.
Benefits of Volunteering. Volunteering supports the Exploratorium and promotes hands-on science, artistic expression, and educational innovation. Volunteers contribute to the community while gaining additional experience and new skills. They get to know each other at gatherings and special events and by sharing their ideas and experiences via an e-mail list.
Why We Need Volunteers. Some of our volunteers bring us a lifetime of experience, others find the experience and confidence gained by volunteering a useful stepping stone on the way to a rewarding career. Volunteering can give you a sense of achievement or could help to make new friends or discover hidden talents.