Personal Wireless Service Facilities (PWSF) – Infrastructure that was initially built for cellular phone usage are now being upgraded and constructed to provide voice and data service for cellular phones along with data service for tablets and other smart devices. 

Service Providers – The firms that provide the spectrum for the general public to use for there cell phones and smart devices. Service Providers are allowed special exemptions from local codes by the federal regulations.

Tower Owners – The firms that provide the support structures for the use of service providers by means of macro towers, base stations and small cell facilities. These firms are not protected by the federal and most state governments and are required to follow all zoning codes, however many state regulations are now recognizing these companies as "providers" and offering exemptions.