What is social media? How does it work? What are Facebook and Twitter and how can you use them? This is a two-part class held on Tuesdays, June 14 and 21 from 6:30-7:30 p.m. Both classes are open to adult library patrons with basic computer and Internet skills. This class will be held in the Children's Foundation Room of the Hudson Area Library. For more information or to sign up, call 518-828-1792.