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.
Community Service: Top 10 Reasons to Volunteer. # 1 10: It's good for you. # 2 9: It saves resources. # 3 8: Volunteers gain professional experience. # 7: It brings people 1  together. #6: It promotes personal growth and self esteem. # 5: Volunteering strengthens your 1  community. #4: You learn 2  a lot. #3: You get a chance to give  back.