Facebook is a free-access social networking website. The "Optical Society of America - New England Section" Facebook group is a method to let your facebook 'friends' know what you are up to with respect to the NES/OSA.  It is also a way to meet new people who share the same interest in optics as you do.

LinkedIn is a free-access social networking website that is aimed at career development and professional networking. The NES/OSA LinkedIn group contains a messageboard for news postings and announcements that may be of interest to other members on the site. It is also a way to connect online with other members that you may not interact with otherwise.