Here are some useful links:
SLA@Simmons on Facebook - Follow us on Facebook! We use Facebook to post information about upcoming events, news items of interest to our members and job posts.
@SLASimmons - SLA@Simmons loves Twitter! We use Twitter as a way to update our members on local events, news in the profession, and job posts. Follow us to keep up to date on our activities and what's new in special libraries.
Special Libraries Association (SLA) - the primary international organization for professionals interested or working in special libraries. The organization also offers a variety of chapters, committees and caucuses for members who are interested in particular fields. On Twitter, they are @SLAhq.
SLA New England- the local Boston chapter of SLA. This group offers a host of professional development and networking activities throughout the year. On Twitter, they are @SLANewEngland.