referrals of consumers to technicians in the field of installation, maintenance and repair of house hold and consumer appliances, HVAC systems, household and commercial electrical systems and plumbing, central vacuums, hot water heaters, humidifiers, dehumidifiers, water softeners, exercise and recreational equipment, lawn and garden equipment, pool and spa equipment, home furnishings, luggage, CDs, computer hardware and software, jewelry, watches, clock musical equipment, photographic equipment, marine equipment, motorized vehicles, and residential home and commercial building security systems; scheduling of installation, maintenance and repair of the aforementioned goods to be performed by others