NSTAR Communications, Inc. is involved in telecommunications activities
over fiber optic networks.
Advanced Energy Systems, Inc. through its Medical Area Total Energy Plant (MATEP), provides heating, chilled water service and electricity to several hospitals, medical research centers and teaching institutions in the 200-acre Longwood Medical area of Boston.
Hopkinton LNG Corp. operates liquefied natural gas facilities in Hopkinton and Acushnet to supplement pipeline supply during winter months.
