Stands for "Fiber Optic Service." FiOS is a data communications
service provided by Verizon that uses fiber optic cables to
transfer data. FiOS is called a "Fiber to the Premises," or FTTP
service, since it brings fiber optic data transmission to
residential homes as well as businesses. Since fiber optic
technology sends data via pulses of light, it is the fastest
method of transferring data. While FiOS is currently used
primarily for Internet access, it can also be used for digital
cable and voice over IP (VoIP) services. For this reason, FiOS
is considered to be a potential competitor to both cable and
Internet Service Providers.